Does your local community college offer welding classes? That'd be a great place to start.
+1
I did this. We have a vocational branch school of a local junior college that also offers various community "Fun" classes. They offer real in-depth welding courses for getting various welding certifications... but they also offer "Welding for Farm and Ranch". It was lots of fun and you get to play with stick, TIG, MIG, cutting torches, plasma cutters, etc.
They also had a couple of welding manufacturers come in and give demos (where you could play with their machines).
Another idea: If you have a farm supply store nearby (Atwoods, Tractor Supply, etc), they usually have welder manufacturers come out and demo products a couple times a year.