At any rate, it may be that making the jump to a job or studies is too big a jump to make right now. It is also often difficult for you as a parent to be the one who motivates your adult child with a mental illness. I would suggest looking in your community for a community program that would involve your son in some activities that might be a precursor to job/studies. Psychosocial rehabilitation, day treatment, and other rehabilitation programs can be quite helpful. Call your local mental health association, ask your psychiatrist, or call the local mental health center for a referral to a rehabilitation program.
Hang in there as this is a long-term problem with which you must deal. Ideally you would like to have your child work his way to more independence, but it might be a slow journey. Get some help from people who know how to do this. You might also find out if there is a support group for parents with schizophrenic children--these groups can be very helpful in providing information and support. The National Alliance for the Mentally Ill is an organization that can provide lots of assistance.