Crave into stone

Of course … … in addition to the @Koumis videos.

Basic use of the BLENDER Boolean modifier:

Now you have other options:

  • Create a shape that will be projected and used as a cutting object.
    Projection_1

  • Align the shape to the object in a front view and slightly offset in front of it.

In the front view in Object mode:
- first select the shape and then select the object on which the shape will be projected.
- switch to Edit mode.
- MESH Menu > Knife Project

Extrude the projeted shape

As you can see, you have several possibilities to achieve the desired result…

Personally, I use the Hardops addon (commercial) which offers a multitude of tools for modeling …
Hard Ops thread