I spent 8 weeks with 8 hours a day in the booth at weldding school and let me tell you you learn alot and its worth it. I am a structural welder at a "rail road" and we weld on a lot of **** so u can throw most of what you learn at school out the window. However i still think its important to at least have someone who knows what they are doing ie certified look over your technique and check your welds for proper penetration and porosity. Anyone can learn to put a tack or a fillet down and even if it looks real pretty it may not be fuseing the two metals together properly. I learned that. The other thing is learning the other postions. I bet most self tought guys arent doing 3g or 4g. I'm not trying to be critical or discouraging. quite the opposite. I urge you to take even a weekend class at a voc school or something and it will open a world of different things you can do by giving you the skills and confidence to attempt them. I love welding and i hope u do too. Almost everything i do is big heavy and rusty ****. one learns to weld through the paint and garbage. I'd rather not but as the saying goes, we're not building a piano. granted when its my own stuff and preffer the make it clean and strong method 