Alternative for psutil for ARM processors (raspberry pi) and python3

As I am unable to install psutil to work on raspberry pi on python3, I am looking for any alternative (or a proper way to install it).

What I want is to be able to see what's the status of the computer in terms of CPU and RAM available, so that if that's the case I can "sleep" the script until the computer relaxes, in order to avoid that the script just finishes without any apparent reason.

Any idea?