i would go Northern Lights is easy, White Widow is easy as well, Big Bud is easy, Skunk is easy but can get tricky, well thats what i know but there are tooooooons of strains... so to know with wich one to start depends on you and what are you wanting to archive, how are you gonna grow, with what equipment, and how are you willing to follow instructions....

Because if you are getting a nice setup, like the ones from General hydroponics for example, and you follow the instrucions, and everything you can grow preatty much anything you want