The list of objects visible in your 5" is pretty much limited by your patience, skill and determination as an observer. Patience and determination is inherent in the person, skill comes with practice, combined with the other two attributes.
Rather than give you a list, I'll attach a photo of a chart I was using just a couple nights ago with my 6". Note that I've had this 6" since 1985 and have spent countless hours with it under skies of all kinds, and it still thrills me with it's views. I got hooked on astronomy viewing the sky with a 50mm scope, then a 3" and later a 4-1/2" I still have drawing of my "discoveries" from those times in the late 1960s.
The photo is of a chart page from Sky and Telescope's Pocket Sky atlas. Atlases like this are typically targeted at owners of a 8" scope. That said, probably over 60% or more of the objects shown, are within the reach of your 5" This is the constellation Cygnus, which lies right overhead this time of the year. I spent nearly two hours in this area lone the other night with my 6". Granted, I was under exceptionally dark skies, but many of the objects are visible in less than ideal circumstances.
If you are new to the hobby, and don't have a chart, this chart shows star clusters as yellow circles, nebulae in green, with the round green circles being planetary nebulae. Stars with lines through them are doubles or multiples, stars with numbers preceded with a V are variable. What isn't shown are the millions of fainter background stars in this area of the Milky Way. These background stars can make hunting faint objects a challenge, but often just seeing an eyepiece filled with countless glowing suns is the reward. The star at the tip of the Swan's nose - Albireo is a beautiful and famous showpiece double of blue and gold.
I didn't have an observing plan, I just looked at the chart, selected a target and took a look. Some were easy, some invisible, and some were in a field of stars way more beautiful than the target object itself.
People think astronomy is a hobby of the eye, but in reality it's a hobby of the mind. Nature holds her treasures tightly in a veil of darkness, and coaxing them free from her grasp is the reward - that is, IF the hobby is for you. Not everyone is thrilled observing faint, barely visible fuzzys, night after night. To me, it's not only the aesthetic view of the object, but knowing it's light came so far to strike my eye. That the barely visible smudge in the eyepiece is 100,000,000,000 stars shining in the past, the light having left their surfaces long before humans looked up and wondered what they are, or even knew of their existence. Sometimes its all about seeing how faint I can go with whatever scope I'm using, and sometimes it IS about the aesthetics of the view, as I slowly sweep the summer Milky Way with a low power eyepiece stumbling upon beautiful sight after beautiful sight. It's seeing a thin sliver of an edge on galaxy, or a face on view of one similar to our own - or two different galaxy types in the same view, one an oval spiral, the other irregular containing a violently erupting core like M81 ans 82 near the Big Dipper. Not far from Cygnus is the large bright planetary nebula M27. Although it's named the Dumbbell, I once heard it called the "Apple Core Nebula" which I found described it's appearance in a small scope much better. This is a view of the Sun's future, when it's running out of fuel and has blown off a lot of it's atmosphere into a glowing bubble, Earth long ago extinguished or if it survived physically, rendered lifeless.
You've seen Jupiter and Saturn, but have you watched the Great Red Spot rotate into view? Have you watched Io close in on the limb of the Jupiter, to kiss the edge of the planet, then fade away against the background clouds while it's inky black shadow is projected against the surface nearby? Were you still looking when it reappeared at the other limb and broke free into the blackness of space? Last month I watched as Ganymede ever so slowly slipped into shadow behind the planet, getting fainter and fainter until it was winking in and out of visibility, before vanishing all together. It was spectacular! I equate the movement of these moons as like trying to watch the minute hand on a clock move. Have you sat at the eyepiece looking at the first quarter Moon, patiently watching sunlight strike the peaks and rims of craters, like tiny stars in the shadows, or caught sight of the fleeting Lunar X as the light changed on the Moon's surface? I'm only stating these questions to show that the universe is full of amazing things and every one I've mentioned is within the grasp of your 5".
But, you ask, how do I find these things? The first trick is to not get too hung up with the technical stuff. That will come with time. Grab a chart, any chart and find something familiar. The Big Dipper, the W of Cassiopeia or the "Northern Cross" of Cygnus and start exploring. Take the time to really look in the eyepiece, because many objects are hiding in the darkness, and part of the fun, is the thrill (or frustration) of the hunt. Be patient and don't get discouraged. Every year I have a friend that spends an hour at the eyepiece of his 8", just to locate what may be Pluto barely winking in and out of visibility, then again the next night to confirm his observation. He's been observing for over 50 years. If you can find anyone to observe with, and observing buddy can really help- especially if they have some experience that they can share.
I hope this helps encourage you to explore and discover why all of us here love the hobby. Always keep in mind every piece of equipment, regardless of size, complexity and cost, has it limitations. The same skills you learn to overcome the limitations of a 5", will serve you well if some day you own a 30" or in reality, when sit down at the console of the world's largest telescope. The universe hold her secrets tight no matter who is looking to find them.