There are ways to block most data collection, as I said an example of this is using a browser with built in blockers for tracking and/or extensions.
The other part is on the user hands, proprietary services and apps are always going to track something even if minimal, like I said using Chrome or Google search or visiting reddit or opening an embedded image preview from imgur are totally on the user, and could be avoided.
Not an expert in this and someone can correct me or expand...
In the case of imgur or reddit, with embedded content like image previews or when following a link the destination site can know where you came from. Here a link that explains it better than I could.
In the case of Google, if you use chrome or search lemmy.world through Google and then click it from the search results, google knows
And if you don't have any tracking protection via browser or extensions, there can be tracking using cookies for example.
Cloudflare is probably a false flag detected by this site
And in my particular case following your link it told me "No tracking detected on this site at present." As seen in this image
Loneliness
Old laptop, Debian with docker running nextcloud, navidrome, jellyfin, gitea, librespeed, wireguard, dnsmasq, and nginx as a reverse proxy.
QR is just image to text, most QR reading apps I have used, show you the QR content before going to the website (or let you disable opening the link directly) so you should be able to check the URL or content and see if the link is legit or not.
But let's be honest most people don't know or don't even bother and that's the real problem.
I recommend DuckDNS as well, you can run it both sides and set up a daemon to update the domain when there is an IP change automatically.
And with Wireguard you can set up a tunnel between both locations so you can share anything you need.
I'm using Debian, with Docker and running Jellyfin, Nextcloud, Navidrome and Wireguard on Containers on my old laptop. So that would be my suggestion.
You could install CasaOS and/or Portainer, on top of Debian if you want an easier way to manage your server and containers.
If you are not behind a CGNAT, it should be as easy as opening the necessary ports.
I have a reverse proxy running in ports 80, 443 and can safely access Jellyfin on a subdomain without issues from outside my LAN.
I use my old laptop as a server, and so far no issues with leaving it on 24/7
For me personally, when you reach a level where you can think, and communicate in the non-native language (without doing mental translations back and forth) with enough ease and speed, no mater the topic at hand (meaning that even if you don't know a technical or specific word you can make yourself understood), and even if you make grammatical mistakes or have an accent, the point of the conversation is not lost between participants, then you can consider yourself fluent enough on said language.
My native tongue is Spanish (could you tell if I didn't mention it?), but I have consumed so much content throughout (and yes I did check how to spell throughout) my life only in English and practiced enough doing conversations both writing and speaking (even with an accent) on the internet that I can communicate with ease and be understood.
I have visited the United States a handful of times for around a month for vacations with family, so I can say that I had to communicate with native people outside the internet now, but I haven't had any formal education except a few very basic English courses in high school.
That's a very specific use case that would need you to provide more information, like what app are you using and what trackers are being reported, and that I particularly don't know if I can help you with.
Maybe if you post said information, someone else can help you.
Edit to add: it is very likely the tracking is being done by the app itself, or when accessing an external link, or embedded content from the app, the app is not protecting you from other trackers, as lemmy.world itself is not tracking you