Honestly, here is my advice.
Unless, you have a big bankroll 20k plus, you cannot do this as a full time job starting out without plain luck. You need to go slow the first 3 to 6 months to study the market. Choose .coms only and really choose a niche inside the .com whether it be LLLL, Trending Tech or strictly two word brandables. Find your interest, Focus on one niche inside the .com realm. Learn, invest then flip or hold...rinse, repeat.
If you get stuck, read the namepros threads again and ask questions often.