A bit of advice is to always keep pot odds
and hand percentage in mind. People always talk about reading books to improve your game, yes, if you have no idea about poker, it would be good to read a book, but if you're already a seasoned player, I don't see it a necessity to have to read every poker book on the planet (imo). OBV you have to dominate the micro level before you can move up(it happens, but not always do you see people succeed online when they start at high limits) So just stay at a lower limit that is comfortable for you, therefore, if you do take a hit, in all reality, in won't be that big of a hit because you're playing micro. Once you have mastered the micro limit you will know it. Just don't start getting greedy and buying in out of your range if you do happen to bink one. Good Luck!