For me "today is the right day" or are you not happy with it ?
The only problem that I can see is a too low resolution for the terrain on the left (raise it to 526).

for the footprints :

1. Use the "Aibrush" to "paint" holes in the terrain : A small brush with a mid softness and a high flow.

or

2. Use boolean operations : put distorded spheres or cylinders where the footprints should be. Select the terrain and the distorded primitives and click on "boolean difference".

Eric