Hey there… This snippet is from Ofensive Security’s official page : Requirements
In addition to our recommended prerequisites above, we require students to be at least 18 years old to take a course. There are limited exceptions, with rigorous application checks for younger students who wish to apply.
For hardware, we recommend a minimum of 4 GB of RAM installed with at least a dual-core CPU and 20 GB of free hard drive space.
The connection to the labs is done with OpenVPN using Kali Linux. You should use a stable, high speed Internet connection such as broadband or higher to access the labs, not mobile internet (3G/4G/5G data connection).
You can read the whole thing here
Hope that helps !