You forgot another person that you probably need in your team, and that is a music composer. Since your game is a visual novel, a rich and well made original soundtrack complementing its story is truly what could make your game unforgettable. I offer my services as a composer for your game for free, temporarily. I also have basic programming knowledge, and I can make the whole audio integration trough code and engine GUI. Here is my YouTube Channel I use as my portfolio YouTube. Here is also a link to a game prototype I've worked on as the music composer and the main audio integrator Trek Of Elements. I usually don't work for free, but I'm genuinely interested in your project because it looks interesting, and you look like a serious person, and I would really like to work with you on it. I'll reach to you on Discord!