One item: Be debt free when you start to fulltime!! It is the best advice ever.
We have never been real “responsible” with our money. We spent what we made. Too many toys.
We bought a less expensive camper than we wanted, and a late model used truck rather than new, but we were debt free when we started. We are still debt free. That is not to say we don't have bills, but a no installment loans, no credit card debt.
We don't have much, but what we have, is paid for. This was the best advice we ever received and for once, I was smart enough to take it.