My advice is start at 2NL. Read everything in these forums. Watch videos. Join a training site. Learn why to bet, call, fold. There are many different subtle reasons to do each. Also, work on bet sizing. Example: how much do you need to bet to get all in by the turn/ river. Learn to maximize value, ie. lose the least when you are beat and win the most when you are best. Learn the value of your cards vs different ranges. And learn how to exploit position, which is when cards matter little.

There's a bunch more but if you start thinking about the stuff I listed, you will be off and running.