He will face a ban of 23-28 months, which can be reduced by up to 25% if he is offered and accept to do a Drink Dive Rehabilitation Course. (He should ask for it if the magistrates do not offer it as it cannot be offered once his cas is finished in court)
There is the possibility that the court could order him to retake his test as he had only passed his test 2 months before, especially as there was a collision.
He can represent himself, pay for a solicitor to put forward mitigation for him (cost should be in the region of £3-400, no need for a specialist solicitor as mitigation is mitigation, no matter what sort of case is involved) or he can try to speak to the duty solicitor on the day. (This is free but not guaranteed, depending on how busy he / she is)
Either way, he should dress smartly, and try to obtain 2 written references, one preferably from his employer or perhaps his college if he is still in education. (Not a family member because the could thinks that one will be bound to say good things)
His big problem could come when he tries to get back on the road after the ban, at his age, with a DR10 conviction on his licence, insurance will be EXPENSIVE !!