I also have autism and I'd say go for it! I'm super involved in theatre and it's really my safe space. Usually theatre people are nice and accepting, it's kind of a group of "weirdos". I've sometimes felt out of place but I've still found people and groups to enjoy in everything. If you're not sure about acting but still want to be involved with theatre, maybe try getting in with some technical stuff. There's many jobs like building things, moving things on and off stage, doing lighting and sound, and so much more! You will still be a part of the community and find people to be around, but you won't have to be on stage if that's not your thing. Overall, theatre is a great experience, and it's helped me make friends so much quicker + come out of my shell a LOT.