Your graphics will need to be handled in whatever app you drew them with. You don't get a lot of options for handling anti-aliasing, etc... you can do pixel art style stuff, but outside of that, you need to make sure you are drawing each frame the way you want it before you bring it in.
Also, saying, I still don't get it and I didn't finish the tutorials that were suggested because I am assuming they won't help doesn't really get you very far.
You won't get anywhere without putting in the work, experiment, do more tutorials, read the manual, etc...