You have plenty of time, and Brett program is perfect.
Don't panic, and no rush for these 100 snatches.
An " explosive " swing will allow to do these 100 snatches on time, paced yourself.
My experience was for these snatches :
- quite stressed by these 100 snatches, very hard to do 100 in time,
- I paced myself, stayed concentrate on my explosive swing, on my technique,
and did more than 100 in time.
Don't panic, 9 weeks are enough.