PapaPotato

I've learned to work in Cinema 4D and I have to say that, once you get the hang of the basics like box moddeling you can get very far just by practicing. like this model: https://sketchfab.com/models/156fb99f319f4095a728db4aa2a7f4d7 all made up form box moddeling, boolies, and cylinders. you could also try to learn Maya because there are more tutorials online for that but in my opinion, Maya is extremely user unfriendly. it is very powerful tho. but if you would like to get started moddeling simple things right away with next to no knowledge required (for prototyping I suppose) then I can maybe suggest google SketchUp? it has a very slow workflow but its extremely easy to use.