PC mouse does not move smoothly?

Hi, since I switched from the Ps4 to the PC with controller a few months ago, and Fortnite with Controller no fun anymore, I would like to start playing with a mouse and keyboard. I have a pretty cheap no name mouse and if I move jerky she something. At processor overload, it is not, I've already observed. Now I ask myself the question if I should buy a brand mouse or if it's.meine PC or s.die settings could lie.

It can help if you use a mouse mat. Also looking for drivers for the mouse. Changing the USB port can also help.