Autistics with anxiety and depression, how do you guys pursue treatment?

My doctor told me to try cognitive behavioural therapy for my mental health issues, but 99% of my brain is telling me not to do it even though I know I should try it. I don't mask well at all and am worried of being awkward, I have selective mutism and the whole point of the therapy is to talk, talking to people makes me anxious, the depression part is saying there's no point in trying, I'm kinda skeptical it'll help too cause I've been anxious since birth and depressed for half my life so how will it help, and they need to interview me before I start to see if I'm a good fit or something??

I've been procrastinating getting help for years, and this specific cbt thing for over half a year. It's so hard to go against the 1000 reasons I have for not getting help. I don't have family or friends to emotionally support me through this, and I pretty much cannot function in society at all. I just stay at home and can barely get work done-at most I can grocery shop.