Really, really bad idea. Anavar is going to suppress your natural testosterone production. How are you going to restart it when you are done with the anavar? Any steroid cycle should include exogenous testosterone and a proper PCT protocol.
If you are gaining fat you need to take a hard look at your diet because if fat increase is not your goal you are doing something very wrong. No amount of supplementation, steroids or not, is going to fix that.
Time to invest in your education brother. Visit the new to steroids section in the forum. Once you have a basic understanding come back and ask some questions. We are here to help.
https://musclegurus.to/forum/anabolic-steroids/new-to-steroids-start-here
https://musclegurus.to/forum/training-nutrition-and-diet/diet-and-nutrition
IMO those OTC supps are a waste of money. If your going to test the waters of steroid use it is best to do it right the first time.
Please consider taking the time to introduce yourself to the other forum members -
https://musclegurus.to/forum/general/introduce-yourself
SEMPER FI