STEAL STEAL and STEAL somemore. Everytime you steal the blinds and antes, that is one more free orbit for you to have to catch a monster hand to 2x up. Most players either steal too much, donk off their chips and bust out. Others, such as you, Steal too little get blinded off and bubble. there is a post on here call Bubble play, or something like that. look at that. when the blinds and antes go up, play your possisioin just as much as you cards. Feel out the players at your table. who is deffending, who is not, who is only playing the top 10 hands. The other thing to consider while you are stealing blinds is the amount you are stealing with. I usually raise 2.5x the bb (this is a highly debated topic). I have found that it is a big enough raise to get people to fold, and you find out the same information as you would with a 3x 4x or 5x raise, and you have saved .5 bb. what ever you decide to raise, just don't make it so much of your stack you are commited with a marginal hand, or you are folding too much of your stack. It is easiest to steal from the button, to the cut off +1. I wouldn't start stealing with compleate crap, widen your range in these possions, mid rage connector, suited cards any blackjack
hand 20 or better. these hands, if called you still have a chance of flopping something, and taking down the pot.
the other thing is if you are called, playing post flop. When you are playing in late pos, and it is checked to you, don't be afraid to bet if you have missed. if they are checking odds
are that they missed too, take advantage of their check and fire a bet. this might take it down and you have added another orbit with his call. remember when you are making this bet, not to commit yourself, if you bet too much you can lose a larger than you need to part of your stack. I usually will fire about 1/2 the pot, if they call and I am on a stone bluff, it depends on how they are playing on weather I fire another barrel on the turn and river. but that is situational and the board texture to your hand.
there are way better typers on here that can explain things much better than I. the best thing I can tell you is get rid of your fear, scared money doesnt make money.