He had some tickets on his record which is why it took him so long, but he built up seniority and even bumped one driver back to preload. They should have explained the process to you during your orientation and hiring process.
Basically, you'll do a little quiz and driving test at your hub, and if you pass, they'll send you to a class for a week. You'll get paid and probably stay in a hotel. If you go around peak, the class might be shortened, but it's supposed to be easier. Just know your 5 and 10s and the other basic rules ahead of time.