I read and listened to quite a lot before giving my DD access to a phone (also 11) and two areas where there seems to be a large consensus are:
- No phones overnight in bedrooms and
- No phone use during meal times.
I let DD have the phone on aeroplane mode to listen to podcasts after dinner, but then take it away to charge overnight downstairs half an hour before her bedtime.
I’ve set a screen time password on ours that my DD doesn’t know which means I can ensure she doesn’t download any apps, and I have to approve which apps have access to camera etc.
She has WhatsApp to talk to friends and family, podcasts, Safari (with highest level of restricted access, which I know is not perfect, so considering taking this off and requiring internet searches to all be done via laptop where I can have more of an eye on it) and apps required for school.
In general, go stricter than you think to start with as it’s much much easier to ease up and grant permissions than it is to withdraw things and reign them in.
Oh, also, I made it clear to DD that this is not ‘her’ phone, it’s a phone she has access to for school work, communication and walking to and from school to let us know when she arrives/leaves, but it’s ours and we decide the rules for it.