Hi! Stamps can be a little fiddly but, There are several examples in the forums.
My settings and source for making stamps from laserable rubber are here:
I just made another similar one in the last couple days with the same material and settings.
You likely want a bitmap rather than vector art. It would be an engrave with grayscale set to “vary power.”
You want the parts to be cut away to be black and the parts you want to keep to be white in the bitmap you engrave. This is usually the inverse of your original artwork.
You might also want to transition with a gradient between the black and white to create a slope to support the raised areas better, as described here:
We would probably need to see your design and know what you will be lasering (linoleum, rubber, craft foam, etc.) to give more specific advice.