Any advice on fixing a form. I feel I might at times be slouching forward and heel driving I correct it but just keep going back. Kinda getting back into it (started on and off running Jan - April but stopped) but couldn't remember how too have the right form
Try to keep your feet more underneath you than in front of you to fix heel striking.
So smaller steps?
You'll probably take smaller steps which will slow you down until you learn to up your cadence (= step frequency).
I did that. My focus was touching the ground under my center of gravity, not shorting my step.