Just want to add one thing here- I am also fairly new to roll film developing, and have been going through the same learning curve-
I tried generic stell reels- FORGET IT!!!!
Buy reels made by a company call "HEWES", Adorama carries them. Anything else is garbage and will be a total source of frustration. Get the Hewes, you will be GLAD you did!
This has been my experiece anyway, YMMV.