As with any other celestial object, I would suggest an approach that involves no expectations.
Go out, make observations, take notes, make sketches; and do as so many other telescopic observers have done for the past few centuries: See what you can see. And be happy with all that you can see..
It's not surprising to hear from owners of larger telescopes saying that you're not likely to see much with a 4-inch apochromat. Similar statements get made almost daily. "Seeing a lot" or "seeing a little" are such subjective terms. Even if one only uses smaller telescopes, one will, sooner or later, end up "seeing a lot".
A Mars story:
Some time back in the late '60s I made my first Mars observations. Before that I had read books on amateur astronomy, books that recommended making sketches (among other things). So I already know quite a bit about observational amateur astronomy before I got lucky enough to receive my first telescope -- a 2.6-inch refractor.
I was a bit more fortunate than some of today's beginners. I didn't have others flaunting their larger apertures and telling me I wouldn't be able to see much. So I went out on every clear opportunity, observing and sketching Mars with my 2.6-inch (not an apochromat), cardboard-tubed refractor Over time, my sketches revealed the rotation of Mars. You see, Mars rotates with close to the same diurnal period as earth. As a result, when one observes the planet at the same time, on consecutive nights, one ends up seeing (very nearly) the same earth-facing hemisphere of Mars. Yet, over time, the rotation difference takes its toll, and ever so gradually, as days become weeks, one sees those features move with the planet's rotation. Eventually, I found myself changing my observing times to catch the planet as early as possible or as late as possible in order to see just that tiny amount beyond one Martian limb or the other.
Did those sketches show much? Well, they showed enough -- enough to keep me going out on every clear opportunity, enough for me to see and identify the most prominent Martian surface features, enough to watch as the planet slowly rotated about its rotational axis.
I have fond memories of those days, and those (long lost) sketches. But if someone had informed me that I wouldn't be able to see much with a 2.6-inch telescope, would I have made those observations? Would I have those memories? Would I have stuck with amateur astronomy for the next five decades? Yeah, I was "hooked" even before looking through that first telescope. But I started out in a different time, and as Jon might say: I lived (and evidently still live) in a different world.
So just go out and make your observations. Don't give any thought to what others see or claim to see. All that really matters is what you see -- regardless of how little or how much that might be.
Edited by Sketcher, 07 March 2020 - 02:15 PM.