I also only game on my home PC and I've been using it for over a year now with Linux. I play CS 2, WOWS and Battletech mainly but check protondb.com for your games. My kids are also using Linux and they also were able to play everything they wanted.
There are a few AAA games with cheat protection that won't work. Other than that: It's awesome and you feel the freedom instantly!
Sorry, but that is far from correct. Of course you can throttle wind and solar production if you want, but the problem of to much energy is a nice to have. You could create Hydrogen or desalinate water in large scales if you got energy left over Regarding nuclear power: If you calculate the cost of nuclear and include that you need to store the waste for thousands of years it's not cheap either. And you also need to source the fuel from somewhere. Uranium is not abundant. And also it takes 20 years to build an new plant. By then it will be even lest cost effective. Rather continue with wind and solar and then batteries for the money.
Install Linux and take a look at https://runtipi.io/ It allows you to easily install docker container for everything you need and keep them updated.