Well the first step is to realize that you suck. It's a hard but important step. There is almost no way you don't suck if you manage to loose 30$ straight at 5NL.
Then take a break - look at the articles and videos on this site, and read some posts.
Play short sessions. Only play for maybe 30 minutes a day when you're feeling well.
Play extremely nitty and pay attention to the other players. I think you can even play profitably by folding everything except AA to AK. Marginally, but it's better than loosing at a record rate.
And then gradually open up your starting hand requirements depending on position, if the pot has been raised and what players you are up against.