Is there any special exercises or production example series for Probuilder?

I want to build game object directly by probuilder. But I get some problems. For example


I want to make a simple cupboard with two pages that could be animated for open animation. Frustrately I could not figure a way for building,at least,not the optimal ,absoutely. I am wandering whether there are some sample course ,especially for concrete gameObjects. I want to be trained more. Thanks very much.