Do not hire coders for custom software in the hopes that you can sell the software. That applies to games as well. Especially to games. This is high risk business. Professional game studios go out of business all the time and those people knew what they were doing. Even if you were to give a game studio a million bucks, they would not be able to guarantee you, that they could make a game that would break even. You can't buy success that easily. Sure, you could poor another million into advertisement. Maybe you even make a million back and only lose the other million.
Even if you would get a good game for an affordable sum, this would not guarantee that the game would sell. And even if it would have customers, there is no guarantee that it would pay for the investment. I have seen games published here that were also on Steam and had barely a single review. I doubt that they even made the 100 bucks that Steam asks upfront as a barrier fee.
Anyway, it sounds to me, like you have all the ingredients and a lot more than most devs have I can compose music, model and animate 3D, and direct the art of the game, but that's about it.
Coding is not that hard. It's easier to learn to code, than it is to learn the arts. You need talent for art. Coding is just following rules and rules about rules and writing rules down for a stupid machine to follow those rules. And a lot of redoing what other people already did. The hard part of making a game, apart from making the game, is designing it, so it is fun. Fun for other people to play.
Running around and eating fruits and changing your shell does not sound like fun. But running around and collecting coins and hopping on shells does not really sound like fun either. So your character has a gimmick. Most characters do. And your hero sets out to save the world. That story has been told countless times and in countless ways. You have neither novelty nor nostalgia to help here.
If you aim for a 2d game in the style your prototype was, you basically need only a cookie cutter template of such games. There ought to be tutorials that will end up in such a game. And you have all the important things like assets. I believe you use gamemaker. https://gamemaker.io/en/tutorials/how-to-make-an-rpg
Should coding really not be your thing, the idea with the comic is good. Publishing web comics is rather cheap and therefore low risk. Or you could animate shorts and release videos. Get a feel how to tell the story, so it is interesting. Because as I said, that story has been told so many times. People get bored easily. It should be entertaining in some way. And achieving that is very difficult.