Hey!

Welcome to FTR. You'll find everythign you want to know and more here.

The answer to your questions are: (in my opinion)

1. Fold
2. I don't know but if you fold to every staight and flush draw you'll fold every hand.
3. Mathematically probably, but in reality no. You don't have the experience to fold if you make half a hand or half a draw, etc. New players stay in pots way too long for way too much money. That's what makes them so delicious with BBQ sauce.

GL. bury yourself in ftr stickies and posts you won't be sorry.