Creating Andoid version of App POST iOS Launch

Our lean startup decided to focus on creating the iOS version of our app in Ionic to begin running the pilot of our product. Now that it is built we want to go back and create the android version to increase our user base. I am on OSX and downloaded Android Studio and Genymotion with all needed plugins to get my app running in the emulator, which I have been able to successfully do.

I have noticed there is a lot of weird behavior, styling, animations, page transitions, etc that I am thinking is pretty common between the two platforms. My question is, what are the major nuances of developing on Android, compared to iOS, and are there any resources to help this conversion for us go smoother? Thanks in advance.