As an apprentice in a repair shop, you can learn more practical knowledge and be more useful. Disadvantages are tiredness, low salary, and some masters will leave some skills.

My major is systematic, but I didn't come from a repair shop.

Practical. Bad schools don't learn much. You can consider studying in a junior college. After finishing junior college, you will have at least a diploma. It is not difficult to enroll students in advance now.