Shocker, they marketed to you. I try to steer people away from AtomStack if and when I can because they just use marketing and tricks to steer people to them. The “new” AtomStack is a just a different version of the double diode NEJE.
With my single diode AtomStack A5 “Pro” I have to use 100% power, 10 mm/sec, air assist and 3 mm decent wood is no problem. It will cut through it in a few passes. Start with LightBurn Software Documentation
and Tutorials – LightBurn Software
and the first thing you should do is learn your lasers abilities. Start here: Material Cut/Scan Test Files - Power Scale
Welcome to the forum and please use the search function. It will save you hours and the LightBurn team and forum users many hours of frustration and repeating themselves while maximizing your knowledge.
The M50 is new so you’ll need to find someone to custom 3D print you an adaptor but you’ll lose that “window” into the laser. Etsy.com is your best friend for finding a 3D printer unless you want to commission someone from the forum to do it for you. Please search about air assist and not just make a new thread.