To give yourself the best chance to learn to oxy weld, get some new steel strap, say 18-20 gauge cut at a local sheet metal shop into small lengths, then practice on nice new metal, make sure you have clean tips, are in a comfortable postion, have the pieces held so that they don't move, etc.......and just practice, practice and more practice, as for doing bodywork, thats when it may pay to try and see if theres a course available thru a local college/tech or whatever, but again, just practice.......I did a course yrs ago thru my local tech college.......was worth doing and if you hunt around there are courses available........have fun, andyd