It would be useful to post some reads/ stats on the villains in your hand history posts. Even something as vague as "22/1 after 15 hands" gives some insight

Hand 1: Id check/fold that flop. Lost of draws and an overcard against 2 players usually means one of them is going to have something they wont put down and then you wont know where you are. That 7 just completed every draw out there and he could already have a Q anyway. All you have is a 1 card straight draw and most of those will give someone a 1 card flush so just check/fold it.

Hand 2: Gotta cbet that. On the river theres no reason to think he has an A or a flush draw. Id probably bet just over half pot (mostly as a blocking bet but also a little for value from an 8 or 9) and fold to a raise.

Hand 3: I bet the flop. On the turn I might check/fold this but im probably going to try another barrel here. Id probably make it $4 but give up if I get called (or raised). This is the kind of flop alot of people will call with any PP just to see what you do on the turn.

Hand 4: This is tricky. Im not really sure what id do here. Definatly bet that flop. I might just check/fold the turn though. With 2 callers its pretty likely someone has

a) A Ten
b) A higher PP they are trying to trap with
c) A set
d) A straight
e) A pair and a straight draw

Against 2 players I dont think youre good very often on the turn here.

Hand 5: I probably make the flop $6 but I probably check/ fold the turn.