We decided to make a game on Cocos2d. Where to begin?

Question

Cross-platform

We decided to make a 2d game on Cocos2d (most likely a runner) and the question arose where to start?
I know that coconut perceives a lot of languages.
What language to write in and how difficult it will be later to adapt the project for iOS and Android?

Answer 1

Use Apple's XCode and Objective-C to write. On android then it will be possible to port using http://www.apportable.com

Answer 2

www.apportable.com is not a one-click solution. I would advise if you want to port, use Cocos2dx and C++. On cocos2d-iphone and Objective C - everything is much faster and more convenient, but porting, as written above, only through apportable