Newlydraw does not do vector cuts at all. You will not be able to cut anything with that controller in your laser.
Your starting photo for engraving is not optimized for laser dithering. This is why it comes out all black. There are a few ways to do this, all of them are on this forum somewhere.
You are posting in a forum for Full spectrum lasers, not rabbit lasers. Full spectrum lasers use lasercut or a proprietary controller. Both of those controllers are completely different from yours. Post in the right forum and you will get more help.