So I've been dealing with SA my whole life, but I've gotten better over the past few years. I heard about this idea once that was saying to go out and do something that makes you uncomfortable everyday. Well I tried it and failed, a lot! Every time I failed I'd be like well this clearly doesn't work. So I stopped. Well about 6 months ago I heard about it again and realized my problem. I wasn't being consistent and that's why I was seeing no improvement. What really changed it for me was doing at least one thing everyday, and if you miss one day it breaks the chain. So my suggestion is just go outside your comfort zone just a little bit everyday, and don't miss a day. This will lower your anxiety the fastest way.