My son is on the autistic spectrum and has been struggling with mental health for some time. He is applying for philosophy and is uber-stressed about his personal statement as he has no extra-curricular activities (unless playing historical strategy games on his PC counts) and no part-time job. He is hopefully starting a bit of volunteering next month, and has been doing extra reading related to his subject, been to the odd lecture and completed a MOOC course.
My impression (I was once an academic but that was pre-children so my knowledge is out of date) is that admissions will be most concerned about his interest in and aptitude for the subject, rather than the extracurricular stuff. He is convinced however that no one will offer him a place.
Would be very interested to hear from anyone with insight into philosophy admissions/admissions more generally for students with ASD, in the hope of being able to offer him some reassurance that his life is not about to be ruined.