Lots of great comments here. If you want to start doing something like exercise then it's great to set little goals. Even 10 minutes is still 10 more minutes than 0. Give yourself the grace to work up to more. It might take you awhile and that's ok. You are doing these things for you and not anyone else. You don't need to feel guilty for taking a day off either.
Also - if you are dealing with depression or other things then I would highly recommending finding resources to help you deal with that. There's no shame in that and sometimes people need help to manage these things. Best wishes!
Ah, yes. Man made horrors beyond my comprehension.