Go and have a frank discussion with some professional mechanics in your area.
Talk to them about the career, their training, the challanges it has and the rewards. They will be happy to advise you on what has worked best for them.
I used to be a mechanic apprentice. I quit years ago and went to university instead. IMHO the auto career is very challanging and difficult these days.
There is a huge volume of information you must learn in order to fix cars properly. Much more training is required than to do other trades. Furthermore, the pay system for mechanics encourages the work be done as quickly as possible.
As a trade career goes, it is very stressful and has a high burnout rate. When I was training, the average mechanic in Ontario would quit and start a new career by the time they were 30 years old.
If you want to learn a trade, frankly, commercial electrical or plumbing is better. If you must be a auto technician, have a plan to advance in the industry. For example, after a few years experience, you could go back to college and train to be a shop teacher. Or you could take some basic business courses and open your own auto repair shop.
On the positive side, there is a tremendous demand for good technicians. If you complete your training, you will be virtually guaranteed steady employment because there are not enough people entering the field these days.