Bill,
Take time to research your shielding gas options and wire diameters. Welding new floor panels in will take a different setup than welding up some 3/16" spring perches...one size does not fit all. Buy yourself a Aloe Vera succulent and put it in the window in the garage..when you burn yourself, run to the plant and "anoint your wounds"!
The standard old phrase is "looks like crap, but it's hell for stout"..that is usually an excuse for poor welding. It is possible to have a great looking weld with good integrity if you practice and are serious about the task at hand.
Have fun, be patient and keep a extinguisher nearby...
Uncle Stu