Common Beginners Problems :
As a beginner I also faced many problems some are here which I think every beginner can relate.
Hanging Pieces.
Random Opening Moves.
to fix use d4, e4, e5, d5 to control center.
Develop knights and bishop early.
No endgame knowledge
Lastly..
The Queen Addiction. Many beginners love using queen as soon as game start . I have seen many of opponents making this mistake which led the opponent to capture their queen early and lose tempo