Kudos on your improvisation here! Can I ask how you are challenging yourself with each new sphere? Repetition alone is not enough to yield solid development. Here at the studio (within the LoP curriculum) I push each student to get each one cleaner and cleaner. This is how deliberate practice works. For more on this:
https://www.smartermarx.com/t/merely-engaging-in-activity-versus-deliberate-practice/377