How does it compare to PollyMC? It was super easy to use and you can play both offline without an account but also online with a Mojang Account. (Java versions)
Admittedly I didn’t actually try to play it online since I just looked it up for a nephew.
I used the Linux AppImage, just download and run it and you’re good (might have to install new java runtime depending on what you have already), but there’s also Windows and Mac versions.
p.s. I’m not really into Minecraft and don’t know what’s up, but apparently there’s some drama or something and PollyMC (with 2 'L’s) is not to be confused with PolyMC (one ‘L’).
Why are you using Chinese enumeration commas?
i.e. “、” instead of “,”