I went to vo-tech to be an electricain. At the time they didn't have an HVAC program so they kinda thru in the basics in the electrician class. Got my Journeyman electrician, and EPA. Went to work back home for a HVAC company and picked up most of the trade from the boss. I get to do almost everything. Service, Installs, refrigeration, ice machines, gas piping, and we do a majority of our own electrical work. I've been there 12 years now and am now NATE certified. Its always been just the boss and me with some occasional helpers. We cover about 100 miles around our shop so we are always busy year round. This year we just hired a Tech out of school to help us. The boss is getting close to retiring and I will probably be buying the business. I think everyone has their own unique story of how they got started. I think if you can at least get in as a helper and catch on quick its a good industry to be in and room for advancement.