Re: I'll carry on as before
Take a look at Pihole (https://pi-hole.net/). A great little DNS server system that is easy to add blacklists to.
It seems to work, my daughter visited and immediately told me that my Internet wasn't working, because her Instagram couldn't connect. I told her that I had blocked all of Facebook, to which she argued, but this is Instagram!
A quick conversation later and she was having second thoughts about Instagram as well (having deleted her Facebook account a couple of years ago).