Hello, I've just started playing cash HU, but only with NL10-NL20 stakes. I really like it because I feel I have a edge against most players. Also my handreading skill are getting better. I was wondering if you could help me adjust and exploit some attributes microHU players have

1. Constant limping button and never raising. Villain just limps every hand even if it is AA or 72o. Should I exploit this by raising? What kind of range should I have? Also how much should I raise? Usually when I raise they just call and then I miss the flop most of the time. They call the cbet and I have to c/f turn making the play a bit of a spew?

2. Minraising the button. Should I minraise him or does this counter strategy make any sense? Should I adjust calling more?

3. Opponent folds almost every time when I open the button and refuses to play OOP, so he 3bet or folds. Should I minraise or even try the limping strategy to get him to play OOP?

4. How to adjust to a villain who is 3betting a lot? Should I 4bet bluff more or start calling and floating the flop more?

5. How should I start adjusting my handrange when the stacks get very short? Do you quit if the stacks are less than 40bb?