Guys, if you are below 20 lvl, only concentrate on farming (stardust, pidgeys / easy evolve pokemon that require 12 candies) and use lucky egg to boost your exp. I managed to gain 64k exp by one use of lucky egg.
Once you reach lvl 20, then only explore more on getting great pokemon with high CP and great IV attributes.
My experience when I reached lvl 20, I meet plenty of Eevee that range between 550-650 CP, I evolving my 3 best eevee and get Jolteon @ 1.2k CP, Flareon @ 1.6k CP and Vaporeon @ 1.2k CP. I also managed to catch an Exeggcute with 680CP and evolve it into a 1780 CP Exeggutor.
Furthermore, once you reach lvl20, the quality of pokemon drop from egg hatch are the same with lvl40, so please keep your 10km egg if you still fighting to reach lvl20.
Be patience and lets roll

becareful yo..... if someone report ur id will get permanent ban as niantic didnt investigate