I can't make September. Should I still buy?
Yes. Buying now locks the best price this certification will ever have, and the self-paced side doesn't depend on your calendar. The playbook and community land the night you join, the training platform follows on 7 September, and you work through it at your own pace.
The only September-bound piece is Cohort 1 itself. If it doesn't fit, you take a seat in a later cohort, live, when one does.