Every generation does. When my parents were born, a computer was a job title. Both my grandfathers were born before the invention of powered flight, and lived to see men walk on the moon. The only constant is continuous change.
My understanding is that Roblox requires changes to the kernel to lock it down in order to prevent script kiddies from cheating. Linux makes that very difficult to impossible, so they abandoned/never supported the platform.
My daily driver is a 10yo Dell business laptop. Before that I ran a similarly aged Lenovo. I run mint.
In my experience, the amount of ram and an SSD are the biggest contributors to how good the performance feels. Running mint on 4G is possible, but performance is comprised. 8G is perfectly fine most of the time. 16G (my current setup) is peachy keen. I'm astounded what I can do in blender on a 10yo machine.
That said, if you can afford one (and they operate in your country - they don't here), then grab a framework, like others have said. If that's not an option, then add some ram and an SSD.
Nextcloud? I was looking for a friend and there was a German company that was offering 1TB for €5. The friend wanted something in Germany, but I suspect you can find similar deals elsewhere.
Try one of the existing instances. Pixelfed.social is probably a bad choice right now, as it's getting overloaded with new members and so importing from Instagram has been curtailed. The others at https://pixelfed.org/servers should be fine. If you later choose to host your own instance you can always move the data from your old one.
How old are you? Once you reach middle-age shit starts breaking, even if you're fit which most of us aren't. You'll notice a good bed at forty much more than you will at twenty. By sixty you'll be demanding one.
Personally, I find it returns much better results than anything currently available elsewhere. It reminds me of a time when search actually worked. Also, no ads and no tracking.
BTW, different instances can supply poorer results than others, so shop around to find the best one for you.
Every generation does. When my parents were born, a computer was a job title. Both my grandfathers were born before the invention of powered flight, and lived to see men walk on the moon. The only constant is continuous change.