A how-to guide or a beginner's guide (video is better)

I hope moomoo can make videos so that newbies can quickly understand the functions and operation of moomoo. For newcomers, I need to spend time trying and error, which is a bit of a waste of time.

Hoping there's a new set of user guides or getting started to learn.

Is there a screening function for A-shares? Let the system screen out only stocks that can be traded by foreign investors?

Thank you!