I would like to get a PC / laptop in the near future, but I do not know how much GHz is good to play such games. I'll probably get one with an Intel Core i7 processor, but just do not know how much GHz is good.
That comes ned only on the processor but also on the graphics card or the hard disk type
Which ones are suitable for that, for example?
GHz does not matter.
It depends on the model, in the case at least one i5 2400.
In addition, at least one GTX 660 is required
If you want to get a notebook, then you would need at least a model with a (mobile) Intel Core i5 - 8xxx CPU, which has 4 cores / 4 threads and a basic clock of at least 2.3 to 2.4 Ghz to approximately equivalent to the Core i5 - 2400 minimum required in this game.
Here is a list of Intel 8000 series mobile processors:
https://ark.intel.com/...ml#@Mobile
At least one Geforce GTX 1050Ti to GTX 1650 should be installed in a suitable notebook as a graphics card since the game requires a minimal GTX 660.
Here you have the complete system requirements for desktop hardware, if you want to grow a desktop PC:
https://www.game-debate.com/...me%20Human
My slightly lower CPU base timing for Intel's mobile Core i5-8000 series is due to the fact that it has a correspondingly higher computing power per core & MHz of the 8000 than Intel's older 2000 processor series.