Dual coding is likely to help with learning, buddying-up may work for some, tailoring for individual needs is really a key factor.
Autism is broad, like dyslexia can be. Autism may be forgetfulness and jumbled dis-organisation, bluntness, lack of interaction, eye contact, seeming to be an empty shell or lacking personality, humour, or seemingly not interested in topics.
Autism can manifest in many ways. Being aware of the need for a release of pressure, for ticks or similar, perhaps they might ask for 'toilet breaks' to escape. They may also be the last to leave the room every single time.