Too bad I don’t have much time right now because it looks interesting and I’d like to help you.
I think you’re making the right decissions, especially with Kickstarter, because there has been a couple of big failures and people are not as trusty as before.
A couple of suggestions that might help:
-Create a Youtube channel and start uploading videos right now, take all your concept art and make a quick video showing that, then share it.
-As soon as you have the prototype make another video AND upload it to itch.io.
-Think about making regular livestreams, you can use Youtube, Twitch or both through restream.io which is free.
-With all that material you can create the Kickstarter.
-Continue doing regular livestreams showing your progress and answering questions.
Nowadays you need to show a great product AND a track record of execution so people will see proof that you’re working on it, that you can deliver and that the finished game will not dissapoint.
In marketing terms you need an outstanding Unique Selling Proposition, remove all doubts and fears and engage your target audience.
There are some great postmortems here, I don’t remember which one but I read a guy explaining how they built their fanbase with Twitch streams.