Expect to have to earn respect. Most guys (at least here) come from the inside, having to pay their dues as a part time worm for years before they turn into the special butterfly that is a package car driver.
Can't answer for the long time getting hired. You'll have to have a background check done. Took me about two weeks, but that was a few years ago. Might not be the same for you.
Being a center managers brother in law would increase your odds, so check if yours has a sister available. (Making an assumption here. Sue me.)
If you do get hired, find an older driver, and kiss up to him/her in exchange for advice. Yes, they do know better than management. There's a reason they've survived for 20+ years at UPS.