First off, I am very sorry for your loss.
I have some advice. After going through some similar things this year: I know it's really dismissing to hear "time heals all wounds" - but really. After time passes, it becomes easier to deal with. In the meantime, for me personally. I got back into making art (or hobbies I once abandoned) I think keeping your hands and mind busy helps. Therapy and counseling is also recommended because sometimes talking stuff out is helpful and they can suggest healthy way to grieve. I think joining groups in hobbies you like, going to events, seeing your friends and family, and generally meeting new people can be helpful too.
Also, I think it's healthy to grieve. If that's crying, listening to music, being by yourself. You should be allowed to get upset and have those feelings. I think sometimes we have to take small steps when making progresses. Be kind to yourself.