@moby
It’s all possible and I can only encourage you to buy a Raspberry Pi and get started.
But beware, it is quite time-consuming.
It will not be done in days. Rather months.

But if you find to have a knack or the interest for RasPi, Linux, Javascript and all that stuff it is a REALLY satisfying hobby.

Go ahead and start with a Raspberry Pi and get it booted. We’ll be here to help.

OR:

Before buying a Pi you could consider installing the mirror on your laptop or any other device (there’s also a Windows installation guide) and see if you like setting it up in the first place.
You could then transfer it to a RasPi easily!