"OK, i see everyone here is recommending to use a DSLR camera and lens not a DSLR and your 8SE..."
First, it is tough to recommend much at all to someone who is trying to get involved more deeply in astrophotography with only budget of $500 yet no EQ tracking mount so, really, any recommendations will only get him partially there.
Next, about hanging a dSLR on an 8se... I don't have any experience with the mount for the 8se but I did check the Celestron website to check on the specs. The optical tube weighs 12 lbs and Celestron is stating the capacity of the mount is only 12 lbs. So, I'm not sure about the wisdom of recommending hanging a dSLR on the end of that combination. What if he goes ahead with this recommendation and he strips a gear or two on the mount? I know if I recommended that and it ended up breaking the mount I'd feel a bit responsible. Again, I have absolutely no experience with this mount so maybe I am completely off-base here but, going by Celestron's own specs, I would not recommend hanging a dSLR on that combo.
There is nothing wrong with capturing snapshots through the eyepiece. Many people are completely satisfied with afocal imaging and I've seen some pretty stunning images even with a cellphone. However, if someone is wanting to get involved in more challenging long exposure astrophotography (and it sounds like this OP is), I'd first recommend finding a decent EQ mount with an RA tracking motor, at a minimum. A budget of only $500 is going to make this difficult though. (Maybe a manual EQ mount and then add an RA tracking motor yourself?)
Realistically, if purchasing new, a $500 budget isn't enough for only one component necessary for long exposure astrophotography. There is the option of purchasing used gear but even that is tough to find now at bargain prices.
Because the OP is still a young teenager, I'd recommend saving more money so he can attain his goals in astrophotography rather than potentially waste money on a rushed and extremely compromised purchase. In the meantime, he can continue to educate himself through this forum and through online research as well as at a local astronomy club (if a parent is willing to be part of transportation). The local astronomy club might also be a good source for some low priced equipment needed to move him in the right direction. I rarely recommend a local astronomy club but it might be a very wise decision in this particular case (depending upon availability and transportation, of course).
I'm not implying that someone needs to drop thousands of dollars at once to get started but there are definitely relatively low cost ways to get deeply involved in long exposure astrophotography. A small EQ mount, a small refractor, a computer, a guide scope, a camera, a guide camera, and then all the various adapters and extensions necessary. Later you can add filters, flatteners, and whatever you desire. Or, as has been recommended in a previous comment, just get started with a star tracker, a used dSLR and a halfway decent appropriate lens but even this will cost quite a bit more than $500. A $500 budget makes it very difficult to recommend anything reasonable. There are far too many components to this type of astrophotography and all the components add up quickly.
To the OP, keep doing what you are doing and strive to get better at afocal imaging while you save some more money. Also, find a local astronomy club. Not only would this be a great source of learning but it could also be a tremendous source of very low cost used gear.