General Analysis for a random game.

So I've never really studied chess like a lot of, let's say more dedicated players. I don't have any fancy chess engines, I don't even own a chess set or any chess books. I just play sometimes at my college during breaks between classes, and of course, on Live Chess in 10 minute blitz games. That being said, I'd love to learn a little about general ideas and especially endgames, which I am horrible at. For the above game, I'd like to know whether the moves I played were sound, or if there was something I missed.

After 6...Nc6, castling is more common, but your move is playable.

Move 17 - I would absolutely take his rook for your bishop.  The board is favorable for either, and the rook is worth more.

I don't see any glaring errors on your part.