Implement a 3D model in my C++ OpenGL project

I have an OpenGL C++ project which involves simulating landing a spacecraft on Mars. It works and all the framework is there. Currently though, the planet Mars is drawn as a plain orange sphere. I would like to replace it with a 3D model of Mars which I have attached as a glTF file.

I've searched for a while and I believe the best tool to do this is using this:
https://github.com/syoyo/tinygltf
I have tested this tool and it works great to draw Mars on its own (you can verify that it works by going to the examples/basic/basic/basic.sln and putting the Mars.gltf file in which i can provide), but unfortunately I was unsuccessful in adding this to my project.

I think this should be fairly simple to do, but i'm not good at C++ to handle or even know what the errors i'm getting mean. Would anyone be able to make this work for me?

The Visual Studio project files are too large so if you think you can do it please email me (can't include email here but when we chat i will say) and I will attach it. Some screenshots uploaded of what it should look like when done - basically keep everything the same except instead of drawing the plain sphere, render the 3D model.

Thanks for reading and i hope you can help me!