OH BABY I LOVE RANTING ABOUT THIS!!!!!
Ok
So the first prospect you should look at is memory. If you want to play a lot of video games and download mods, games, ETC, You need to have around 500 GB For gaming. 1 TB (1000 terabytes) are for the people who has like 3 monitors and a big computer runner (forgot the name.) You can buy more in the Microsoft store i believe, but that can be around 200$ for 1tb and maybe 100$ for 500.
The second prospect is proabally the graphics. If you want to play games like Skyrim or Fallout 4, you dont really need a beefy computer. (Unless you have like 1 million mods) You can have even 4gb RAM for singleplayer games like the ones i just listed. SO make sure you have at least 4gb ram for single player. The graphic card does not to be huge, but i recommend bigger than 1536 mb. (i have a mac so rip me if im wrong.)
The third one is a little complicated, as it is about multiplayer. This is where the GBRAM comes in. Not sure why but it does. I recommend around 6GB RAM to 8GB RAM for multiplayer. It costs more though sadly. But for games like minecraft or league of legends, you only need like 4 xD. But for black desert online is a different story. I recommend 8GB for games like that.
Fourth is pretty simple. Windows. A Mac (Apple) is one of the worst computers out there as far as compatibility. SO get a windows laptop like Dell or Acer. NEVER EVER EVER GET A LENEVO!!!! Trust me.
ANyway i know this is a really late response but there ya go if you still wonder!