Water Spashing

I am trying to make a water splashing, like something dropping in water.
My question: is there a possibility to reform the poly surface I created.

like: just pulling parts out of the surface and not build on (like I did)

Please send help! (Stress laugh :smiling_face_with_tear:)

subd and a lot of patience could get your here.

make sure to understand rule of three and start extruding and sculpting to your desired result.

rule of three video here-