This is all solid advice but since you’re a newbie I’ll provide a little context:
Your speed is way too high. Slow it down by half
When engraving art with thin vertical lines you’ll get better coverage if you slow down a bit. Half is definitely a safe bet for most materials.
reduce power by 2/3rds
Since you’ve slowed down, you should drop the laser power so that you don’t torch your material. 2/3rds is a solid bet because speed isn’t linear but power mostly is. So by dropping the speed number by half you’ve probably reduced the actual speed by more like 2/3rds. Someone charted this out once, if you dig in the forum you might find it… but just getting a sense of the rule of thumb is enough here.
Turn off Grayscale/vary power.
Only turn this off if your image is truly black and white. If you do turn it off you’re going to get a dithered dot pattern which is probably not what you want. My suggestion would be to ensure that your picture is pure black and white first and reupload it and leave it on vary power.
In general higher lpi means you’ll get a darker engrave. The tradeoff is that your engrave time will scale pretty much linearly with LPI. Double the LPI, double the time. You’ll probably want to consider that as you plan larger engraves.
So. All that is to say that dialing in engraving settings is a bit of an art, and you’ll definitely get a feel for it as you do more.