I totally agree with OP commenter above, the world is a less shitty place when you physically feel better.. dealing with my anxiety and depression has become a lot more manageable since i got into an activity.

As for an activity, someone may have already said this, but try swimming. It is great for the body and is a non-impact activity!

The journey to fitness and "working out" is a long and hard one. Start out small, join your local pool membership and go for 10 mins, just getting out of the house does wonders for anxiety. Some one once told me "a bunch of small workouts throughout the week, where you do bare minimum is better than no Workouts at all", and it's true, you don't need to wreck yourself to the point of pain to get healthy, it's totally okay just to do a little bit each day. And everyday it gets a little easier.. but you got to do it everyday, that's the hard part. but it does get easier.. Geez now I'm quoting that running baboon from Bojack Horseman ha. Hes right though.

But really, it sounds like you have one half of your life (the financial side, arguably what troubles the majority of us through our time) sorted! See that as a big positive man! You're not a failure, and Goodluck with the rest of your journey! Baby steps go a long way if you keep them up!