Removing the stock is actually pretty easy on the SKS. The little button at the rear of the trigger guard pushes in with a punch & rubber mallet. You will need to compress the action into the stock to get it to release, though. I usually put mine upside down on the rug, step or kneel onto the stock, then tap the pin & out she pops.
+1 to leaving it stock, though. My Yugo 59/66 shoots great, and I like the stock it came with. I will be re-finishing it soon just to have something new to do.
I know of no decent way to add optics to an SKS. Lots of companies make lots of junk to hang on it, none of it will hold zero long term IMO. If you want a toy to play with, then rock on with all the bolt on trinkets. We all have at some point. If you want to have a blast shooting it, then invest in ammo. Keep the stripper mag as well. When I take mine out, I have 20+ stripper clips loaded & ready in the box. The standard box feeds 100%, the 30 rounders not so much.