Just make sure you have port 53 and 80 open. I recently had some problems myself trying to get Pi-Hole up and running. I already had dnsmasq taking up port 53 for a wifi hotspot, which conflicts with Pi-Hole’s own DNS. Aside from that, hosting any websites can also conflict with Pi-Hole’s frontend.

If you aren’t using your Pi 3 for anything yet then I already assume this shouldn’t be a problem though.

Good luck and have fun setting up your Pi-Hole!

If you want to take it to the extreme, Alpine is probably one of the best options.

Do I spot the cover art to one of Geoxor’s songs?

Your best option to avoid unnecessary data collection is to just use a FOSS server. Paper (Github) is a pretty good one imo. It’s also super lightweight and has some really good performance tweaks.