You're so young to be worried about how the relationship is going to work. Any woman you date while you're working UPS driver hours and still decides to stay with you and continue a relationship will work long term. If she can't handle your hours now, she definitely won't be able to if children get added to the mix. As for making time for each other, that's easy. You have enough time off to see each other now. If you have kids, that's when you have to prioritize your relationship with whatever free time you have.
To sum up: Date. Find woman. If she sticks around for a couple years marry her. Live life. Die.