Few recommendations from the top of my head, from skimming the post.
I’d recommend checking out QubesOS (www.qubes-os.org), especially since it seems you switch between ToR and already use Silverblue, which is AFAIK similar, but why not go all the way in?
Also for VPN - I’ve switched Proton for Mullvad VPN, because I really like the idea they are going for - if you pair Mullvad browser, that is designed to have the same fingerprint for all users, with a VPN that’s from the same company, you can kind of expect that most of the Mullvad VPN users will also be users of Mullvad Browser. Which means you will not be one of the few Proton VPN users with Mullvad fingerprint, but will have the same fingerprint as most of other users of Mullvad VPN. This will make it harder to fingerprint you based on your browser. One word of warning, though - don’t install extensions to Mullvad. If you do, you break the “same fingerprint” premise, and the more extensions you install, the more identifiable you are. Mullvad should be used without any extensions.
Another thing I see is music streaming - I think that in general I’d recommend just getting a cheap laptop/NAS and run your own Jellyfin, and slowly start building your own music collection. You can also run Matrix server as a bonus, and bridge all your communication (including Signal, even though that may not help that much) - but it does help if you need to use some kind of service, i.e Messenger, for group or work related purposes.
My approach to music was to cancel my subscription, and then use the money I save to spend on albums on Bandcamp, so I still support the artists I want. I make sure to do that every month. Since there’s just wast amount of music to get, I use Headphones with an account on redacted.ch to fill my library, but I still make sure to buy albums I like even if I already have them downloaded. The added bonus is that you actually don’t loose any of your music, if the artist decides to pull it off the streaming service, which has aready happened to me several time.
If you want hosting your own LLM, take a look at refact.ai. But note that it’s not really cheap, I’ve recently upgraded my computer and decided to use my NVIDIA 1060 to run refact, and it still didn’t work well - 8Gb of GPU memory is borderline usable, and I couldn’t do the finetuning.