I have a suggestion for 88Michele88, I'm going to assume they still check this forum. I cannot imagine how difficult it would be to try and develop 6 games at once. Sure, you could do it, but each one will only receive 1/6 of the attention it deserves.
So instead of making 6 games set in the same world, why not make one game in which all of these stories are told alongside one another, each in different chapters? This technique has been used before in video games, notably Octopath Traveller. It's pretty clear that you have it sorted in your mind how these various stories interact, so with a bit of planning for how they eventually meet up, and what order that needs to happen in, you could make one game in which you tell all of these stories. Something to think about.