ai can be helpful for checking code but when it comes to art, ai will always be worse than your own work no matter your skill level. ai can only copy from other artists, if you learn to draw it yourself not only will you be able to make more choices with your characters, your work will actually be your own. voice acting is super cool but not always necessary. you could always just add some free to use music instead.
take that inspiration you got from other games and channel it into something cool, thats something valuable that ai cant do!!! that is part of the fun of game development i think. taking all the stuff u thought was cool and making it your own way, if the ai does it for you its not really as fun yk?