First of all I think it's great to see elderly people like you get into 3D Printing and electronics!
Stefan already gave some good tips and also a bit of time has passed - so I wonder how your project is going
I'm personally currently building a low-budget Prusa MK3 and I also happen to have an Anet A8
So what you're talking about is exactly the kind of stuff that I do / use.
Some of this stuff might have been said before, but here are my thoughts:
You'll need to get a new board to use TMC2130 on the Anet, as its board doesn't allow for switching out drivers. The cheapest way is to use RAMPS + Arduino Mega 2560.
Usually, what you get from Amazon is the exact same stuff from China as what they sell on Banggood / AliExpress, so I recommend Banggood as it ships a lot faster than AliExpress (to Germany at least, I think it's the same for Denmark) and is only slightly more expensive.
For example currently, there's a set with both boards for just 15€: https://www.banggood.com/3D-Printer-RAM ... 84594.html
It does also include cheap drivers that can always come in handy and it should be cheaper than buying RAMPS and MEGA2560 separately.
What you will need extra is: RAMPS-LCD-Adapter (under 2€ on Banggood) as well as some long female headers (2-3€ for a set of 5) https://www.banggood.com/5pcs-8P-2_54MM ... 05371.html
because you will have to share the SPI signals with the LCD and the stepper drivers. (see my setup: https://unixb0y.github.io/blog/articles ... mc2130-pt2
Then, of course some TMC2130's (as many as you want). You can choose to only use them for the X,Y motion (most noise) and use the ones in the kit for the rest of the motors or alternatively use TMC2130 for everything.
Be careful to buy the drivers with the correct setup. FYSETC sells driver boards setup in "standalone mode" (no SPI) which are hard to reconfigure (tiny smd soldering needed). Get these for example: https://www.banggood.com/TMC2130-V1_1-S ... rehouse=CN
The wiring harness isn't as difficult as you might think. If you can crimp and / or solder, that's all you need. Instead of crimping (need to crimp 2 wires in one connector - very tricky!) you can just solder together a few jumper wires that you have lying around (or use a breadboard - NOT recommended
except for testing purposes)
Here's the best video about these drivers IMHO: https://www.youtube.com/watch?v=AVHVCPcFHUs
Also, as others mentioned, when you start using TMC2130, you will suddenly start hearing your fans
The 40mm Noctua fan used on the MK3 is perfect, but a bit expensive (20€). I've heard there are clones on AliExpress, but couldn't find them yet.
Good luck and keep us updated, if you wish!