The post office is a great place to start a career, but as an MHA, there is zero work life balance. Especially if you have a family. You HAVE to have more than one off day, or getting off at a decent time to have a life is normal. Alot of the regulars there are depressed, rude, and unhappy, which proves money isn't everything.
Management will work with you, if you're up front and honest about your situation and if you come to work to work.
The culture. The older regulars are set in their ways, and the younger millennials can not put their phones down to work.