Show the building, not the blueprint. People can’t knock down what they didn’t know you were making.

Plans announced early collect opinions before they are sturdy enough to survive them. Telling people also hands over some of the satisfaction of having done it, which quietly takes the pressure off doing it. Finished things argue for themselves and need no defending.

Take the project you have been describing and stop describing it. Work on it for a few weeks in private, telling only whoever is actually helping. Let the first update be something you can show rather than something you hope for.