Find someone that will let you work with them evenings and weekends to decide if this trade is really for you. What looks attractive may not be nearly as attractive when it is your sole means of support. Regardless of your age, you are going to have to start at the bottom, probably working much harder (physically) for much lower wages than you are now. While not being "trapped" in an office is attractive on a sunny 70-degree June day; it is not nearly as attractive on a 20-degree February day! I remember rough wiring a house with no windows or doors installed in the middle of a snowstorm. A nice warm office looked pretty enticing. Every job has the good and the bad - that is why it is called work. Just go in with your eyes open...