I would advise going to a well respected trade school that specializes in welding. Learn as many different types of welding as possible. Under water welders make over 100.00 per hour. Make sure you master each skill. In order to be successful and in demand you need to be very good at welding, so you will need to practice and master each type of welding you desire to do.
Hi Ricardo, in order to be a welder you need to be certified. I'd recommend going through EPCC to start. There you will learn basic math skills (as applied to building sites etc.), blueprint reading, grinding, torching, fabricating, and beading. They will also teach you specific welding techniques such as MIG, TIG, STICK, or ARC Welding. I hope this helps!