Usually the bigger the board the more stable, also if you’re really new i’d suggest to tighten the trucks on it. Tight trucks will lead to less accidental turning when you’re trying to find proper foot placement so you don’t wipe out.

Try to find a freestyle board

A comfortable one (a board on which you'll be comfortable) sorry for my English)

Try a larger board the tend to have more stability

Watch tactics boardshops they explain about different boards for different styles of riding

I got a planB and it is really nice it was little expensive but that is cause I customized it but planB is good