The place I learned a lot, reddit r/piracy love it or hate it. That and fmhy.net as someone else mentioned. Go on the megathread, follow the suggestions for VPN browser adblocker, and when you want to pirate something find a site in the megathread or fmhy.
I would suggest Fud AI. For starters, its Foss. I use a fork of it, but its only available on android. Its a bring your own ai, so use a private ai provider if u want. Mistral works well and its comparable with everything. The most private and accurate thing you can do to track calories is to get a scale and weigh your food.
I have been hosting my own server for a few months bow. Works amazingly. One thing is their seems to be two versions of the server, make sure the one you install is the actively maintained one.
Get a nice pair of IEM’s for audio quality. If you need Bluetooth get a fiio Bluetooth DAC or smtn similar