Confidence, love for self, feeling great about you and your abilities comes from actions.
Do you want to be a person who does x? Then, do it.
I want to be a person who travels the world. Then, I need to do it.
Need a shower? Take one, use a shower chair if you need to. No one cares, but you, whether you do or don't, and what does it matter as long as you get clean?
Have weight gain from steroids for a multi-week migraine? Go for walks after dark when the light isn't so bad, and do things by handto have less noise in your environment.
Have a butt ton of crafting supplies from before yogot sick? Use them. Enjoy what you can, and make something pretty or practical.
Rest when needed.
Take care of you and your body as there is no one else who cares as much about your stuff as you do.