Hey dude, why not start with something simpler? Maybe try making the game of Snake so you can get used to developing on the 3DS.
You might use Unity to achieve this, there are resources here in GBATemp that teach you how to run Unity games on 3DS, you can easily look for them on Google.
Everything might look impossible at the beginning but a project like this should introduce you to game development on hardware like the 3DS.
And in the future, it's better to submit a Demo/Proof of concept instead of promising projects. Even more so for something of the scope of what you want to achieve (something like this takes years to achieve!)
You might use Unity to achieve this, there are resources here in GBATemp that teach you how to run Unity games on 3DS, you can easily look for them on Google.
Everything might look impossible at the beginning but a project like this should introduce you to game development on hardware like the 3DS.
And in the future, it's better to submit a Demo/Proof of concept instead of promising projects. Even more so for something of the scope of what you want to achieve (something like this takes years to achieve!)