Answer:
It'll take time.
Step-by-step explanation:
Losing someone you looked up to or highly liked/loved is a serious thing. It may seem strange or stupid to grieve over a person you don't know, but it's really not. It's normal. I suggest remembering how Juice Wrld's music made you feel and revisit the happy memories. Then, maybe you could talk to someone you trust who won't judge you. :)