start thinking about next summer
Apprenticeships are a big commitment. Don't have it in you yet? Work on your resolve (while working on a farm for a much shorter time)
Growfood.org posts "short farm stays" (here) and long-term internships (here) and much more.
For full-on apprenticeships check out MOFGA's apprenticeship program for work in Maine
and ATTRA's super database.