As an apprentice, you have an obligation to complete your coursework and attend off-the-job training. Your employer has an obligation to release you from work duties to attend off-the-job training where applicable.
Yes. It is recognised that as people mature their circumstances mature with them, and this sometimes creates barriers to study.
You may be eligible to apply for Recognition of Prior Learning (RPL) with your Registered Training Organisation to have your prior learning and experience considered against the completion of an Australian Apprenticeship.