Hi T
Take a look in Doc’s and search previous topics for lots on this subject.
Here’s one.
If you’re just getting started with image engraving, maybe a bit bigger image might be a bit easier to begin.
The treatment you’re applying may make better image engraving but if your settings aren’t right yet, then it may add to an overall blacker engrave…I notice if there is a person in one of them, the hair is extremely dark with no detail, and background is similar darkness to subject, try to use a higher contrast.
For a small image like they appear to be, you might start with low power and increase until best outcome. Same with other settings, but perfect each setting before changing the next one & perfect focus each time.