Should I develop the game directly using unity standard or unity android

I have unity free with android license installed in my computer and I am developing a game for android. I made some prototype levels using unity, Now what I want to know is should I continue developing directly or should I change any settings earlier so that I dont have to worry about later or will unity take care of it. Because android has lot of different screen sizes and resolutions, I want to know this early on because I dont want to go through lot of unnecessary things later on. Please help me out here should i just concentrate on my game and make it directly or should I do it otherwise.

thank you guys for you help

I would recommend switching now to the android platform that way you can get straight away with using mobile shaders and things of that sort.

And when you switch from web/standalone to mobile it usually has to re-import some stuff. So yeah, I would switch the build platform to Android right now.