On voices: never happen. If you think development takes a long time now... You have to remember I'm one person doing the work of many. Voice actresses need to get paid too and I don't make enough for that. And I refuse to use AI voices... I've heard that done and I just don't like it.
On starting your VN: You will find it really difficult to find a dev willing to try to help you with this. Aside from the fact that we really don't have time; it's a complicated process to teach someone how to code, render, and animate. And that is only a part of it. I had to learn most of this stuff on my own. And if I'm honest, it really is the best way. I will give you this advice though - You're going to need Renpy. Google it. You need that to code (make your game story and dialogue). The site has tons of documentation and comes with an example game. You're also going to need images, and what you use is up to you - HoneySelect, HoneySelect2, or go the more challenging route and try DAZ3d. I would advise using HoneySelect2 (LH and Serenity use this). Download it and just start using it.