1) It's a dance, so I should play it a bit faster and lighter. I should aim for the long note, and see the bar before as an upbeat. Very much as you do already, but a bit more clear, and without the accent in the first bar. And it's a very typical "classical phrasing". First one phrase (2 bars in this case), then almost the same phrase again (the same length and same direction), then there comes a twice as long phrase + an ending. Mostly you do "part 1: Quiet, part 2: a bit louder, part 3 (the long one): start very quiet, and do a big crescendo, and then go back in the ending bar.
I hope I'm not too unclear. And try to stay in tempo in the trill.

The 2nd piece: Very good! Just make sure all notes comes at the same time.
3rd: Also very good.
4th: Very good pedal for a first timer

I feel some other might know this piece better than I do, so I leave this to them.
Good luck with your exam! And you've done a great progress.
One thing though.. What's that squeezing sound in the back? It's quite annoying
