My parents' house is a temple, but it's a small temple where I work leisurely every day without any hardships.
Each temple is a different religious corporation, and policies vary depending on each chief priest.
If you were to become a chief priest, you would still need knowledge of Buddhism, education, daily work, and constant devotion. If you're a chief priest, you'd be better off doing calligraphy and manners than the general public.
However, a wife only marries a man who is a monk, and this does not mean that she marries a temple. Basically, it's the same as a normal family, and if you get married, you'll have to adjust to some extent to the other person's family's methods, but the only thing you should cherish is the happiness of your husband and yourself.
There are various ways to do it depending on the temple, so I can't say it unequivocally, but if it's necessary for the temple, the monk who is the heir to it should also wear it, so wouldn't it be best to have him teach it?
At any rate, the most important thing is for you and him to have a friendly and happy family.
My mother is a temple wife, and she is afro, dread, and looks funky, and she goes out part-time in the summer, and she likes alcohol and is far from the image of a temple wife, but I've never been ashamed to have such a mother as a temple wife. They are loved by their friends, and they have had a positive impact on the temple.
There is no teaching that a temple wife should be like this. Let's go freely.
... But if I had to have just one essential item, would it be to always smile?
If you smile all the time, your family and those who come to the temple will surely feel at ease.
That monk is happy to have a girlfriend who seriously worries me like this.
I'm sure you'll make a good wife.
I sincerely wish you a happy future.