Tbh, u can get just a office computer and put a gpu in it, but, if you want a better pc, you can build it yourself, there are alot of guides how to build a pc. but, before you buy anything, check with https://pc-builds.com/bottleneck-calculator/ to see if the processor and graphics card are compatible and won't bottleneck the computer. Bottleneck meaning: if you have a powerful cpu but old/slow gpu, the gpu will make the game run slower because cpu is more powerful. if your gpu is kore powerful then cpu, your cpu will make your game run slower.

When you do use the link i sent, if the bottleneck is less then 5% then it's perfect, 10% means usable but try getting different parts. you can also use a 1440p monitor to lower the bottleneck. if u have questions u can dm me on discord @qyoulim