This is tough, but lots of people have done well…
The pair of videos from Laser Everything is a good place to start. I refer people to it an understanding of interval, but it’s on photo engraving and well worth a watch.
This guys stuff always make me green 
It’s always more helpful for us if you fill out your profile with the type/power machine you have. We can make better suggestions with more information.
For these kinds of questions, you should include speed/power/interval/dither and lens, such as F number…
Have fun
