I would recommend looking for volunteer opportunities. Be open, what exists around you may not be exactly what you want to do, but it you're doing something positive, the journey will make it worth it.
I don't think it can be too large, but like others have said, there has to be enough quality content in each location you can visit to compensate for the vastness of the open world.
It be amazing if you could go inside every single building/dungeon/etc. and have every one of them chockablock full of things to experience, like they did with Elder Scrolls 6, but look how long it took for that game to come out...
Yes