As a beginner, doing any activity above what you were previously doing will likely carryover to your squat/deadlift/etc.
That’s good news on two fronts. Firstly, you can now part justify humping your pillow. Secondly, you can focus on 5s pro and learning each movement, proper execution, moving the bar quickly, properly warming up and less concerned with hitting 52 reps on your squat and you’ll still get good results. Make sure you’re doing assistance, mobility and conditioning work.