Im autistic too, and BPD- basically i relate very much. Social skills in the context you want is better phrased as asking how to mask, as thats the term for when autistic people “learn” social skills often by mirroring others, but causes burnout and depersonalisation, and anxiety in the long run as its exhausting. I recommend trying to connect with other neurodivergent people , preferably over strong interests :] Its a lot easier and beneficial to socialise when both parties actually operate on the same wavelength, and trying to befriend people you are aware you probably wont be compatible with is harmful in the end. If you dont believe you can get places without being sociable, try looking in other places, ones where skills heavily outweigh how sociable you are!