I highly recommend you try proxmox to get the most potential out of you system. Basically can run many services and vm with little overhead, dynamically sharing the specs.

Now about those specs… what everybody else said really but heres some pointers:

You don’t need a big dedicated gpu unless your doing something that explicitly demands it. They are tricky to setup with virtual machines also.

If you plan on running a minecraft server i recommend at least 8gb ram. Most will probably run fine on 4. You can probably run quite a few things on 8gb but ram is cheap and its nice to have some extra room.

For cpu, the more things you do the More sense it makes to have more cores. If you plan on buying then amd ryzen x y z is you best option where.

X is the number you want higher Y is a number you should not care about as much Z is potentialy the letter “G” for graphics, they are often more expensive. Get them anyway because now you dont need a dedicated gpu (and even if you already own a gpu. Trust me you will thank me if that one ever has issues)

If you really want me to draw you something decent up that will give you plenty of freedom to experiment.

Ryzen 7 … G, 32gb ram. Small ssd for os. xTB of performence HDD ideally configured as some raid in proxmox.

It still cannot be said often enough that a (well cared for) second hand unlabeled laptop running ubuntu is all what most people need when they start pondering about home servers.

Not sure either but one of the important chances is that Dash (Dynamic Adaptive Streaming over HTTP) is being replaced with a newer system on YouTube.

There are some good innovations in the replacement but its much harder to implement.

Those first two are reported to work incredibly well using proton compatibility on steam. Proton is not the same as native support, which is why its not mentioned in any official game Information but it is native to steam. (Also works in heroic and litrus for gog/epic/other)

A platinum (community) rating is as high as it gets, may as well be native or better then on windows.

https://www.protondb.com/app/548430

https://www.protondb.com/app/899770

For TFT i found they use the same anti cheat as some other games. Used to work before, no longer does now but with dual boot all your current stuff is just a minute away (windows updates not included)

Might be game dependent but nowadays games like withcher 3 run better on linux then windows for me.

Anti-cheat is admittedly a pain though. Chivalry 2 used to work and now no longer does.

Though those anti cheats tend to be very invasive so i prefer if everyone moved to a system thats is user personal security first so the market would align with that.

What games are they?

One of the reasons i am sticking with Arch is because steamdeck os is build on it, whats good enough to game for valve is good enough for me.

I have both Arch and my old windows install on separate m.2 ssds. By default i log into the arch one which uses the windows ssd as a game installation drive.

This way when i do have to use windows for some game modding or testing, i can easily access and sometimes run the games from there.