Hear ya, transition from MTT to FR Cash was tough adjustment for me too when I first did it (went -8 Buy-Ins in first 2k hands)

1200 Hands is such a small sample size, post your stats again once ya hit 10k

Regarding your hands, here are my thoughts:
1.) Either Call Flop Re-Raise/re-evaluate Turn or fold is fine too. Don't like the shove, would expect to see mostly 2-Pair+ playing for stacks on that flop (maybe an QQ/KK or occasional Axs nut flush draw)

2.) Like the action down to the river, you charged for the draw. River is so read-dependent (hint). Without reads, probably fold to the >PSB bet and make a note.

3.) Bet more on the flop (.10-.12), I like the turn bet and without reads I am calling down the river and expecting to win a fair bit of the time.

Again, reads/stats are so helpful in these situations, including them will result in better analysis/discussion.

Hope this helps, good luck!!