I think walking once a day, even if it's just for 15 minutes is one of the most essential things that most people can do.
Just bear in mind, you probably need it all: mobility, stretches, strengthening, cardio. I'd guess especially your core muscles and harmstrings are short and weak and gonna need some attention.
Yoga is incredible for me. And I find it easier to follow-through if I do it in a small group or 1-on-1 to just listen to whatever the person in front says and follow.
If it's gripping, and I don't get distracted by something else more gripping, I'll burn myself out binging everything. ADHD and OCD might play a role.