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