I just joined and have no ideas yet, however if you want to handletter a big project why not trying to do a font by hand, scan it and use it for your project, I think that could also work
Updated to say I did try that! I've been working on a Calligraphr font for a bit, but I think it'll need more work before it can make a whole game! That said, this is a great idea that I'm definitely coming back to when my handwriting is neater!