1, I think you should go to a studio not far from you, specialize in this line of work and be their assistant for free. Be diligent and sweet.
2. You can also go to a training class, but the cost is not necessarily. As long as you can afford it, you can go, and you can get to know more friends from your peers and communicate more in the future.
3. Private education, I don't think so, unless I know friends in this business, I don't think they will charge, at least I won't.
Find a local photography team and join them. You can learn a lot there. Get to know these people. Ask them to contact you when they have business. Then you can learn more, ask more and see more.
You should buy a machine yourself. To play photography, you need more shooting, shooting with various gears and parameters.
6. I think it is necessary to study the angle of the object, the angle of the camera and the object. It helps you to look at other people's good photos.
Product photography, interest is more important. Of course, if you have talent, you will get started quickly.