Does this work when buying Minecraft?

My question is whether I can theoretically buy Minecraft from another device and then play on my PC. So basically register and buy on another laptop and then log in to my account with the account I bought it with and then download it?

Yes that goes through the mojang account

Yeah that's right

Mojang accounts are not created on the Minecraft site, so Minecraft.net right?

But

Do you have a link there or could you briefly explain to me how to do it? ^^

https://my.minecraft.net/de-de/store/minecraft/#register

you go to this page and register with your email and a password

with your email and password you can then log in to the Minecraft Launcher, which you can also download from minecraft.net

You go to https://www.minecraft.net/...net/de-de/ sign in the top right then register.

then you sign up to buy the game.

if you are on a different pc go to the same website log in download the game down log in again and can then play.

but keep in mind that you will then be logged out on the other pc and have to log in again before playing.

that means you can only play on one pc at a time

Do you have to log off each time before logging on to another device?

No, this happens automatically when you log in somewhere else in the minecraft launcher.

Thank you SO MUCH! ^^

Nothing to thank for

Register on minecraft.net and buy it then you can just download it

Yes that's not a problem at all.
I use my Minecraft account on my computer, laptop and on my mobile phone (on my mobile phone with the MineChat app).
However, you should only ever have one Minecraft device open, otherwise it can happen that your account is blocked for 2 hours.

So, buy an account on your laptop and install Minecraft there. And if you later go to your computer, log in to minecraft.net and install Minecraft again.