My thought is that you are helping. By being an active user posting content, you have helped to boost this places numbers. And the more content there is the more people we can bring over to this side.
The content you create or share, discussions you contribute to and curate using votes are useful for growing Lemmy too. Just read rules and maintain good ethics.
You can also point more people here, just show them https://join-lemmy.org/instances and cool apps like Liftoff or Thunder or perhaps Sync, and tell them to not overthink their choice (they can always switch accounts/apps). Do not introduce them to Lemmy on desktop at first where the federation is not very smooth without add-ons.
Not plugins as in browser addons I don't think (tho those might exist too)
On mobile, no time for links, but you can google buuzzwords:
Checkout userscripts. A feature from a time when the experience of the web was still supposed to be hackable and not designed by corporate (you can in theory still create your own personal UI/UX for most sites). You'll want a userscript manager like tampermonkey. Disclaimer that if you don't understand javascript you could run malicious code, though the community provides some safety. If you want an extra safety layer copy/paste the code into ChatGPT and ask if its safe to install.
Eh, kinda. It's comparatively easy to set up an instance, as in "renting a VPS, figuring out how to use docker, installing docker, installing and configuring a reverse proxy, getting an SSL certificate, getting a domain, linking it all together, figuring out docker compose, and finally getting the instance connected to the open web".
But the upkeep of an instance is a whole other story. Constantly keeping an eye on user numbers, server and client performance, storage usage, needing to scale the machine up with a growing userbase while also managing the cost and somehow finding the cash to run it, plus the dread of being responsible for the data of users on that instance, requires a strong mind and a lot of time.
While the technicalities are somewhat "easy", expecting anyone to spin up an instance and manage the influx of hundreds to thousands of users in a short time seems unrealistic.
Yeah i noticed the issue, i was just talking about maybe having an instace to just experiment or just to make the main instances less crowded. I wanted to make a personal instance just for me but it reached the limit of my current knowledge so now I'm stuck. I wanted to do it on a single Raspberry pi but it somehow doesn't work, but that's off topic. The moderation of the own instance is entirely another issue that you have to think about when trying to make a big instance