I don't know what the requirements are for someone who has already had some training. I know that those applying as first year have to have passed an Algebra class.
Since there is a projected shortage of about 50,000 electricians nationwide, I know of several locals that are really expanding their apprenticeship programs.
When you go for your interview first impressions count, so wear clean clothes, wear a real shirt (no T-shirts). If you're a guy, get a haircut. Look people in the eyes when talking to them. I realize this is basic stuff, but you'd be amazed at what many job applicants look like.
Be prepared to pass a drug test. The apprenticeship committee won't ask you to take one, but you can almost bet that your first employer will.
I don't know how big that local is areawise, but if they ask you if it is a problem driving 50 miles away to work & then driving back at night for school, the correct answer is "No."
Few things are harder to put up with than the annoyance of a good example.