Monitor your calories intake. I started with 2 cheat meal per week, then 1 cheat meal per week. After that I stop clean diet because losing weight isn't my main concern now. I just try not to overeating the whole day and keep lifting. Google calories monitoring/ calculator.

Do a good strength program. Simple Strength, Stronglift, and my favourite Jim Wendler 531. I want to try Simple Strength however I don't workout in gym and my bar is a cheap fixed type bar so 531 is the best program for me.

The most problem with beginner is they think only need to work their chest and arm everyday while crunches and sit up will give you six pack, ignoring what others advice them. And then they turn to some drug or supplements.