Here are a couple of links to the calibration templates I developed for my PRU.
The first will help you find the best cutting settings. Right now it’s labeled with the old power/speed units but you can change it to the current format (I’ll do it myself if I can get some time on the laser this weekend).
This one is for engraving. Same caveat about labels.
The posts go into a fair amount of the thought process and approach to finding settings that work for different materials. They might give you a head start on finding settings for materials you use a lot.