Hey there, downndone2. I wish I had some good advice for you about how to overcome these things, but honestly I'm still trying to figure that out myself. I don't really have too much in the way of anxiety issues, but the depression is seriously paralyzing at times, and that's before the autism and adhd pile on top of it. I don't have it as bad as some (I can hold down a job, at least, and I do go out to see friends and family about...oh, once a month or so), but any and all sense of drive or motivation tends to shut down for anything that isn't immediately urgent or necessary. Like my sink. It's had the same load of dishes soaking in it for...nine months, I think? Maybe longer? It's all rusted over and if I ever do manage to dredge up the gumption to tackle it, I'll probably just have to throw most of it away.
To practically answer your question though, unintuitive as it may be, I've found that giving myself permission not to overcome these things often helps, at least a little bit. There's this sense of pressure, all the time, that I need to get things done, I need to be better. It feels like all the tasks and responsibilities I put off and avoid are skyscrapers, and they're all falling down all at once and crushing me. It's like I can't breathe sometimes. But oddly enough, when I give myself permission to accept that most days are gonna be bad days, and I'm just not gonna be able to break out of my shell for the most part, that pressure lifts a little. It's when I let go of the sense that I need to dig my way out that I sometimes find this second wind which allows me to make progress. I don't really know how to explain it, other than to say that the days in which I manage to work through the paralysis are the ones in which I don't blame myself for letting it take me in the first place. I don't know if this helps or if it would work for you, in no small part because I have little experience with anxiety and no real idea how it might alter that dynamic, but this has been my experience.