Advice for a mom

Hey so I have a friend that is staying with me and her 6 week old baby. He has hit FULL colic mode. She is struggling with a little PPD as well. I am trying to help her, i have 2 babies of my own (each almost 1 and almost 2), but I do not know how to help sometimes. I want to just swoop in and be Mom but I want to help her transition into a Mom herself and not actually handicap her from learning herself. I am not always gonna be by her side and want to do whats best for her. What do yall think too much help is?? && what are the best ideas to help her?? TIA