The best way to fail is to try and change everything at once. Rather, change one small habit at a time, consolidate, then add another one. Use cues that exist in your daily life to remind you of the need to exercise.
Build the habit of balancing on 1 leg when brushing your teeth for example: after a few days, it will have become an automated habit, and you’ll gain time-free balance practice at 2-3 times a day. Or make it a rule to try and get some mobility work done each time you’re browsing your smartphone: deep squatting, ankle stretching, just sitting on the floor in a cross-sit position, etc… It’s not much, but if you do some mobility work each time you pick up your phone at home, I bet it will accumulate fast!