Originally Posted by gastone
Looking forward to the hunt first.
That's it, one step at a time, really. Welding was an obstacle for me as well- first, learn to cut metal. Get a grinder, cutoff wheels, and abrasive sanding wheels, and then some square tube. Practice measuring, marking, making cuts. Wear eye protection! Operate safely on solid ground and clamp down your target!
Then go to Harbor Freight and get their $90 Flux welder, watch a few tutorials, then practice on your cuts of the square tube. Make some abstract art with it, or something. Cut, weld, polish (sanding wheel). Make shapes- three equal lengths of tube with 60 degree cuts = a triangle. Adjust your amperage and feed speed to your liking. The square weld magnets they sell make it easy to make right angle welds.
Once you can weld a sealed square out of square tube with reasonable polish you're probably ready to put the skills to basic use- just remember what's around your weld when welding- if its flammable, it will probably catch fire. Good welding blanket and area prep goes a long way. Gloves, apron, mask, and watch YT for welding techniques.