Hello.
I bought a PC (I compiled a computer with this set):

ASRock B450M PRO4
ADATA XPG GAMMIT S11 SSD
GPU RX 560
Ryzen 5 2600

The drivers on the manufacturer's website are for Win10 / 7 only. My question is how can I install Linux on this PC? Where can I get the drivers? It must somehow go. How is this addressed?
Thank you

Just go ahead and install any recent Linux distro, it should include drivers that work, though you may need to later download better GPU drivers from the distro's repository.

Use at least a 4.15 kernel (possibly newer). Anything earlier may not work with that chipset properly. It can be accomplished to install with earlier kernels, but it's not going to be a smooth installation in all likelihood. I have an X370 and tried a couple distro's and nothing earlier than 4.15 would properly boot without some issues. Given that's even newer chipset & cpu, may require a newer kernel even than that, but I believe 4.15 should still support it.

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^ debian stable with a backported kernel (currently 4.18 iirc) might be a relatively painless way to do it.

or manjaro, though i don't really like recommending it.

I think that Fedora, currently Fedora 29 is a great choice to get you up and running on your new build. Though Fedora is not an LTS (Long Term Support) or a Rolling Release, each version brings new updates that work with newer PCs. The installation is straight forward and the default Gnome DE is great to get started.

Pick the distro you want to use. If any hardware doesn't work, we'll help you.

You may want to boot to Live CDs of the distros that you are considering and test them out in Live Mode; then you can select one that seems to be the best fit for your preferences.

Hi,

I also suggest that you test drive on the new hardware with a LiveCD/DVD/USB. Look at Get Your ISO, LiveCD & Pocket OS

to hopefully provide you links to a Live system of your choice.

Hope this helps.
Have fun & enjoy!

" drivers on the manufacturer's website are for Win10 / 7 only"

Those drivers will be of almost no use. (if ndiswrapper ever got finished then maybe)

Linux is generally offered in a distribution (distro) that has both the basic parts and usually programs. The basic parts tend to cover mainstream hardware but not all.

As above consider getting a dvd of a mainstream distro. See distrowatch for some ideas. Many of the top disto's offer a dvd that can be booted to the newer machines. You may have to return here to get a few of the missing hardware working.

As above, a new system will generally require the support of some of the most modern kernels (basic part of linux) . Distrowatch has that information usually.