How to unmask

How to unmask as a high masking autistic girl? I feel like i’ve been ignoring all my needs, my sensory issues, and myself for the sake of social validation I don’t even have an opinion anymore I don’t know how to unmask i don’t know what my needs are or whatever the heck frustrates me i’m always frustrated by something but i don’t know what it is Can anyone whos in the same situation as me help?