Patience, Grasshopper. We are not here to serve you. We are here to help you, but you must also try to help yourself. Take a deep breath. Relax. Good. Now move on.
Click on the link @evansd2 provided. Here it is again to make it easy for you.
Now click on item #6 in the list. This will take you to a super easy and methodical test method that uses only 1/2" of material and will let you dial in your settings PERFECTLY for every material. You will never again have to beg for settings. You will never again have to deal with excess charring and flashback on your materials. You will level up to being an expert laser user.