My nephew considered the priesthood, and then went to a state college. While he was in college he decided that the priesthood was his path. His parents, my sister and BIL, talked him into staying in the state college and getting his business degree. They approached it much the same way I’ve heard parents approach their children about getting married young - if it’s meant to be it will still be there later. He graduated with his BBA and then joined the seminary. He will be ordained next year.
One of the “best” parish priests I ever had the pleasure to know spent 4 years in the Marines before deciding to become a priest - his experiences gave him a unique outlook on life.
As stated above discernment never ends and it only begins with the decision to become a priest.
As for waiting, whatever you decide is best is probably for the best. I just wouldn’t rush into joining the priesthood for fear that taking a year off might sidetrack you, that tells me you are not sure of your decision.