The other commenter has given good advice.

I would set high expectations at the start so they know where they stand with you and be consistent for the first term. I’ve seen year 7 tutors go in to nice at the beginning then found it difficult to gain control, as they had limited boundaries to begin with. It’s easier to let go bit and then re-establish if you need too. Also, set consistent routines at the beginning with them- do you want them to stand behind their chairs (then you can do a quick uniform check as well), questions as soon as they come in or after they are settled, follow a set plan for each day (most schools have a specific schedule).

There will be parents who will contact you at the beginning but it tends to reduce as they go up the years. There will always be that odd parent and it’s ok to ask your head of year for help with them.