It's okay if you're not comfortable yet. You may have to wait for the right timing. I think I started talking to my mom just by saying that I actually missed her when I went to college. Didn't share much else. Then moved on to some past stuff that I was sorry for, nothing current. That was over ten years ago. I'm usually pretty good at expressing myself but I'm just now getting to where I can tell my mom some of the stuff as it's happening and not freak out about a reaction. Some of it just comes with time. And I think some things are better left unsaid to parents.