Hi @DesolateNight and welcome to the forum. You're definitely not alone here in having things feel so overwhelming at times that it can be difficult to do even the basics. What kinds of things do you have trouble with the most, if you feel like sharing?
I find it helps me to break whatever I need or want to do into really small steps. I try to think about the very first step I need to take to do what I want to do, and I try to focus on only that one step while I am doing it.
Writing lists can help me also. Overwhelm for me is like a messy jumble of 'big'. Lists seem to organise it all in a way plus it can be easier to see small steps from a list on paper than when it's all in my head.
If you're interested there's a thread on the forum
here where people share their daily goals and encourage and motivate each other along the way. It can be helpful to share the struggles we have as well as our wins, however big or small.