Sounds like you have a life. Why bother? I mean creating a game is or can be a daunting task.
It can take possibly a year to get familiarized with DAZ but you will most likely make already some easy renders 5 minutes in.
The one thing i can say is, you need to be committed and be prepared to fail.
I personally gave up and ceded my attempt of making a game.
One thing i would give as an advice is to put your story onto a flowchart. You need to stick to that chart to make your story work.
Everything else will come over time but your story needs to be consistent.
There are a lot of threads about DAZ and RenPy though you may want to check also other engines that fit your need.
Hope you will succeed where i failed.