easy adc?

While I am not particularly good at League of Legends, I personally find ADCs with some kind of dash/escape much easier to play. For example, Ezreal, Kaisa (ultimate), Lucian, Corki, Tristana. These champions will especially be helpful, when you are having problems with positioning in a fight.

If you prefer one of the other less mobile ADCs such as Jinx, Aphelios or Ashe, then I recommend you to build Galeforce due to its dash ability.