Assalamu alaykum wa rahmatullahi wa barakatuh, Should a beginner student of knowledge stay away from warning or commenting on possible errors in person’s aqeedah or manhaj? Jazakum Allahu khayran.

As a beginner student, your errors will be a lot, so u can bring it back to the scholars, and don't busy yourself with arguing, you should occupy yourself with learning the religion. Of course in no way shape or form I mean that u seek knowledge from someone you are not sure of, quite the opposite.