Yes, please do 2-3 warm up sets with a lighter weight and build up to the weight you would like for your 4 working sets. In regards to the timing of the exercise, start your squats every 2:30min. So by the time you finish your set of 10 reps (approx 30secs) you have 2 mins “recovery”…BUT do your fillers in that 2 min period.
Remember, I have incorporated rest in the first block of strength each day. It’s designed in this way to replenish your CPT stores (anaerobic capacity) and nervous system. After these 4 working sets the rest time/recovery becomes less in the supplementary section and very minimal rest in the conditioner.
Hope this helps and let me know how you go.