To be honest, I hadn't thought of either of the solutions you suggest, but I think they would negatively affect the gameplay in my game.
Imagine that the player clicks on a piece of furniture to open it. With the first click, they position themselves but don't open it, so they would have to click again... and so on with the hundreds of drawers, books, and other objects in the game...
I'm going to try leaving the left mouse click for moving, but leaving the action button on the keyboard or changing it to the right click.
Thanks for the advice anyway, best regards!