If you have $47 in your account you should NOT be playing $1/$2 cash. The general rule of thumb for cash games is that you should have between 20 and 30 buy ins for the stakes you are playing. I.e. the normal buy in for $1/$2 is $200. You should have approximately $4,000 to $6,000 in your account to justify playing this level. This is why you play 'different' at the higher stakes.... because your playing with everything in your account and its therefore 'scared' money. Based on the hand scenarios you have given and the questions you have asked you should be playing as small stakes as possible till you grasp the game a bit more, otherwise you will most likely lose a lot of money.
Try playing $0.02/$0.05 cash games or $3 sit n goes and try and build up your bankroll as you learn.
As previous poster said - read 2+2 forums for good advice.
Good luck