I've found the number of the days feels much more than the years, and has greater impact, even though it's all equivalent.

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

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

Never thought of it that way. I try to never judge people based off appearance, but I know people around me do.

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

I mean yes, kinda. Not having to care about somethings would be relieving.

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?

I'll also look into that. Thank you.

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?

Yes.

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.

Do you have any recommendations on how I should work it out? Is there any measurements I need to take? Any websites?

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.

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

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.