July 1 deadline confusion

hello!

i have ~131k in loans and make $75k-$100k (i’m fully commission so my annual salary can vary greatly.

I have been on SAVE forbearance and have not chosen a new plan. Got the emails from Student Aid and Nelnet saying I need to switch plans by July 1…

I am confused as to what the July 1 deadline is for? Is the July 1 deadline just to pick a plan? Or will my payments start July 1 if I choose a new plan today? How does RAP play into this because it isn’t an option until July 1st?

Thanks for any help in advance, just want to make sure I’m on the right timeline/track.