Wondering since I don't have bottom metal and mags if I should wait to shoot my first club match?
Definitely don't let it stop you. I used a .270 deer rifle with an internal mag for my first match. Even without the detatchable, you will have some time to reload if you've practiced to be efficient with it.
5 good hits from a blind magazine will get you the same score as 5 hits from a 10 rounder. You can't miss fast enough to win.