Advice for Daycare Volunteer?

Hello! I am a 15F in virtual highschool and just applied to volunteer at a local daycare center and am (most likely) going to get accepted :). I see myself as a elementary school counselor/pyschologist as my future career and have always loved working with littles! I have had experience dealing with and caring for a large group of toddlers (with a church) a few years ago but honestly don't remember what was challenging for me. I wanted to ask for advice and what to be prepared for ahead of time! Any tips and tricks would be great too! Notes: south US, daycare is more of a pre-K with 3 levels, STEAM oriented, lmk if you need more info!