@candiecoatediv At the load screen click "New Game", create or select a household (doesn't need to be one you'll use), after exiting the CAS to the worlds screen, go to the three dots at the top left of the screen and choose 'save as', give this game save a unique name you'll know, then save. Now when you enter your game, at the load screen if you hit the blue play triangle it'll fo the last game you were playing, or you can choose the 'load game' button and select which game you want to play.).
You should have separate 'Game Options' settings within each new game. All of the settings on your other game should remain separate. You can adjust the aging, weather, etc., in each game separately.
When you begin a new game it is a fresh, new one like you began with in the first place. If you want to move any of your households into it you can by first saving them into your library in the gallery, then add them to the new game. They will load into the new game with their skills, but lose their inventory and money. They will just have the base household money like others in the library.
You can save multiple games this way. Just name each one something different so you don't get them confused. 😉 The following should help to clarify this more.
Before you begin it's always good to save a backup of your current game save, though.
This video shows how to save a new game for different households, for example: https://youtu.be/zWuCxjTlJf0
This thread discusses 'save', 'save as' and 'new game' a bit, which may clarify a few more things: https://forums.thesims.com/en_us/discussion/808391/what-do-load-game-new-game-and-save-as-do
More info on new game saves: https://forums.thesims.com/en_us/discussion/870322/if-i-create-an-all-new-game-will-my-existing-game-delete
