Well, you've taken an even bigger load on your shoulder than I have, then. It's really hard to do everything on your own. For me, learning art and music was not an option, it would have set me back even more years. So, the art and music had to come from somewhere, and I'm happy that the artists I've commissioned have been so nice to work with. And sometimes you need to reach out for help with details, like code you just can't get right. The Ren'Py forum is an absolute treasure for that, as well as friendly furry visual novel developers on Discord. Make use of the sources of help you have, you won't regret it!
Good luck with the project! If somethin is lovingly put together, people will notice, regardless of how long it takes to make it :)