I started my career as an electrician at the age of 19, and have been to many different companies and met hundreds and hundreds of electricians. I would estimate that 10% or less of electricians start out this young. It is extremely common if not the norm for people to become an electrician as a second career. Seeing an apprentice in their 20’s or 30’s, and even older is nothing new and no one looks twice. My only warning to those who are in their 40’s and up would be to prepare for the possibility of people half your age teaching you the trade and giving instructions.