No, this is not what I meant, I wanted just to give you several options. I just tried to say that there is not perfect tutorial for everyone, so try to find your way.
You already opened a discussion about opam exec -- dune in other thread and you had a lot of replies, so I don’t see the need of mentioning here again.
Please see my comment here about dune stanzas. You can use dune init proj to explore the dune files. Sometimes the trees doesn’t allow us to see the forest. Be patient.