Perlin noise sinks land masses?

I’ve just started using World Machine and I’ve been referencing YouTube occasionally for help; I have simple shapes for an island started. When adding the height adjustments as a mask to perlin noise most of the island sinks underwater, and I lose detail when I try increasing the elevation. How do I solve this? I don’t want to lower the sea level as I’m making an experimental map and I don’t want to limit certain areas too much.