I went though a deep depression and I have Asperger Syndrome/high functioning autism. I had a good therapist, but they pretty much told me what I already knew: the bad feelings will never go away, or at least there will always be things that will make you feel bad. Once I accepted them, somehow, I was able to get at the root of what was causing them. From this, I gained many things I always wanted in my life. I had low self esteem and bullying caused me to isolate myself for decades. I found my confidence and I started to open up. I became responsible.
Part of it was that I went to my first con, too. I was normally quiet. I said hi and asked around for locals. I've heard that furry is good for autistic people. I experienced it first hand.
If I learned anything from the Calm app, it's how to focus on your breathing, and if that helped being mindful, then that's it. I'm pretty introspective, so I can't tell too well. As much as I can do that, I somehow became self-aware. I finally saw everything that makes me autistic and I did something about it.
I say all that and right now, part of my acceptance has become that it's okay to be me. If I want to think and talk about specific things, I can.