1) First of all, you need to buy an electric welding machine and a cutting machine, and of course, covered electrode. Then go to the scrap yard and buy some iron to weld.

2) Buy a book about welding theory, watch all kinds of welding videos online, and practice after the theory.

3) Welded joints can be polished by cutting machine and welded again. If it can't be welded, sell it to the recycling station.

4) If you have relatives and friends around you, you can ask them to teach.

5) There are many welding industries, and the welding technical requirements of each industry are different. You don't have a master to teach yourself, and you don't have the corresponding welding equipment. You can only learn a little, not a major.

6) Self-taught welding costs a lot. Personally, I think it's better to try it in a factory that recruits apprentices.

7) You can register for the exam at the local technical school or the technical school of the Labor Bureau. When you sign up, you will be given the exam book. Go and take the exam when it is due. Now it's all computer tests, and the questions are not very difficult. Another welding special operation certificate only tests theory but not practice. I hope I can help you.