You can combine work and study as a trainee. There are several ways to gain a traineeship:
Approach employers you would like to work for directly and let them know of your availability for a traineeship. You can telephone, email or visit them.
You can also approach large employer or group training organisations that you know offer traineeships (or example large energy companies a government transport company like rail or bus).
Look for job vacancies in your local and state newspapers as well as on major job boards.
Many people get traineeship offers from employers they are already doing a part-time job for.