How soon after starting did you do a 30-day challenge?

I’m still trying to figure out my workout week now that I’ve incorporated hot yoga -I usually strive for some balance of weights, cardio and flexibility and try for 7 workouts in 6 days. I’m still trying to tie it all together but I’ve been reading about the 30 day challenge and not sure when I should consider it. I’m on week 3 of 4-days a week yoga.