It looks different for everyone.
For some it could be, being able to shower once a week, rather than not at all or being able to get out of bed. To go for a walk, when previously that was impossible, or to even open the front door!
As I write this, I realise I have got a little better. I never used to have the energy to shower, or do much really, now I shower daily, and can do my intense workouts again, 3-4 days a week. Some days are harder than others though
It's really about what works for you, and baby steps. No point running before you can walk, and it's always important to pat yourself on the back, no matter what, and to not beat yourself up, because that is not helpful at all.
Tomorrow is ALWAYS a new day! That's how I look at things if say, I have a really crappy day, and can't do much. It's taken a lot to see things this way, after years of beating myself up if I couldn't do something, even something that seems so easy to others - we are all different.
Be proud of yourself for the small things - like wow, I did good today, I haven't done that in so long. And as time goes on, things get easier and easier.
You will have good and bad days, we all do! But it is important to recognise when this happens, and it's absolutely ok to have a bad day. Always, always big yourself up for the things that appear so small