Don't worry, I already suspected English might not be your first language. It isn't mine either.
However, you might want to change the conversation with the king (Kitsune tf) from saying "carmine" to "chimney".
(I actually had to look that one up because I thought carmine was just a fancy word for it [like the German word Kamin or the Italian version])
carmine refers to a red pigment.
As for the mimics I'm not really sure either since I neither have a way to tell what they drop, nor know what to use these resources for.
For release schedule I'm sad to tell you that my answer is naturally biased and likely won't help you much XD
However I think RPG-Maker MV is git-compatible (git is a version control system, works best if the files are stored as plaintext [json (the maps are saved as json), js (plugins are saved as js] ), which would make it rather easy to make another branch and remove unused Maps and variables for beta-releases (and also to revert changes if you don't like them)
If you were to open a Patreon or something similar I'm sure you were able to gather some funds for the game and granting them access to the new version before non-backers is a system a lot of people use.
Periodically releasing version is also great way to receive some player feedback.
Through in the end you have to choose whatever suits you best.
If you want to try git and need help I'd be happy to assist (through it might be less easy to understand in a itch-comment)
I can also try myself at some JavaScript, through I'm more used to other languages.
Good luck with your plans.
Edit:
I'd be fine just being listed as "Kevin"
Thank you a lot for including me in the credits.