[Ruy Lopez]

First, I would recommend Sit 'n Go Strategy by Collin Moshman available here from 2+2. He outlines a tight early strategy followed by blind stealing aggression and correct ICM shove/calling in the late stages. Next, just keep playing, studying, and posting hands and your game will improve.

In the hand above I would raise to 600 pre and bet ~pot on the flop (make the flush draw pay, etc.). You still have >20 BB so you're not quite to high blind push/fold yet. Play some poker. I think a shove here only gets called by better hands, whilst slowing down can get some value out of your hand. Don't worry if you lost this one hand, over time you'll be ahead here. Just fire up another...