New Android Game Designer.Help Needed :)

So I am a new game developer and was wondering if you guys could help me out.i’ve made games during game jams so i know how to use my resources.however i think taking help from seniors should help me in my first public game.i am designing for a touch screen so what suggestions do you have what genre should i go with and i heard on the Extra Credits Youtube channel that making games for touch screen should only use one hand and not two is this the case or nah?