If you have got a Nvidia video card and you want to use it, use X11. Other than that use Wayland unless you encounter any bug or incompatibility.

Wayland is more modern and actively receives updates and features.

I checked the XDA forum a bit, I found this but I’m not sure on how to unlock the bootloader, install TWRP and flash the ROM?

I had once bricked this tablet while playing around with rooting it and I had to take it to a repair shop. So I’d appreciate if there were working unbrick instructions and also working instructions on how to install TWRP.

What kind of servers could I run on this spec?

Interesting use. Unfortunately I haven’t found any usage like that. Maybe a home automation system and an Arduino interface?

The screen resolution (1280 x 800) is kinda bad, and it’s also an IPS display.

How do you recommend I debloat the tablet without bricking it?

Yeah, I’ve used it as that for now but the display strains my eyes. Is there any app/feature which could help with contrast and readability?

Yes.

I have tried selling it but people only want the display and will pay only the fraction of the price.

I have also wanted to donate it to people in need but I think a smart phone would serve a better purpose.

I’m very anxious of how I would look and don’t know which style would fit me.

Couple of weeks of looking silly sounds like torture for a person with already low self esteem :)

But I will try your advice if I didn’t find anything better.