The underlying Linux operating system that RetroPie runs on top of is intrinsically multiuser.
You only need a free TeleTYpe program (I recomment putty for Windows) to gain access from your laptop in the same way as WinSCP does to move files.

Username pi - Password raspberry
The pi user does NOT have administrator rights, but the 'run as super user' keyword "sudo" can be used in front of any commands that needs them (no admin password required).

Make the terminal window as big as you need and use the nano editor to change configurations.

bye.

@Ecks said in Help on overclocking the Pi 4B:

For that second method do i need to do that "sudo apt update" for RetroPie still or i am good also if i was to do the "arm_freq=1750" would i need to increase the overvolt to use "gpu_freq=600"?

There are no standard overclock settings. A setting that works on one pi may or may not work on another. As a general rule though, if you are increasing the clock speed of a component then you will most likely need to over volt it as well. However, you'll need to perform tests yourself, nobody will be able to tell you what overclock settings will work on your pi.