It's nice that you're looking into this trade!
I think the main thing you need to decide is if you want to go the union or non-union route.
The International Brotherhood of Electrical Workers has a great apprenticeship program through their Joint Apprenticeship Training Committee.
That's a solid, structured path that will get you a good wage and benefits.
On the non-union side, a lot of utility companies and contractors have their own programs.
I know a couple of guys who went to a pre-apprenticeship school like Northwest Lineman College to get some basic skills and make themselves more competitive.
Requirements typically include being 18 or older, having a high school diploma or GED, and a Class A CDL.
You'll need to be in good physical condition, pass a drug test, and be comfortable working at heights.
The apprenticeship is a long-term commitment, but you get paid to learn on the job!
You can talk to people at your local IBEW hall and utility companies to see what's available!