Further, I think it is largely undesirable for people in their late teens or early 20s to be living with romantic partners. Breakups are way more complicated when you also lose your housing.
People don't get good at stuff unless they practice
At some point you need to just do these adult things in order to get good. Delaying doesn't change that much. Better to get the practice over with as soon as possible.
Travelling with a partner is a better bet. Involves a lot of the testing scenarios that living with someone brings: decisions, shared finances, putting in effort, cleanliness in shared space (roadtrip car, motel rooms) etc. But worst case you've wasted a week and a smaller amount of money.
