Get out toys and treats and play. I’m a crazy cat lady too, so I have a stroller to go on walks in, harnesses to go out in the yard with. At first they would fall over, just lay in the grass, had to throw treats on their head to get em moving. Starting younger helps, no bad habits to fix.

I did something similar, and would play with them. Pick them up and give them snuggles, then play.

Granted sometimes I ended up napping with the cat during snuggles, so use that at your own risk. Though cuddly cat naps are their own reward I would argue.