Getting an ostomy tomorrow - advice?

Hey everyone, 21M and was diagnosed with Crohn’s 7 years ago. After failing 4 different biologics + being in an active flare for the past five months, it has come to the point where I need an ostomy. Unsure if it will be a colostomy or ileostomy, my surgeon says he will not know until he gets a better look at me during the procedure. My surgeon did say that it is about a 75% chance this is permanent.

Any advice for a young, active guy who is pretty nervous about how an ostomy will affect his life? Any and all advice is appreciated!!