Q: What about the story and tips and—
A: You should watch The Definitive X-Com Commanders Guide by JadeStar and GuavaMoment (the thread for which you may or may not be able to see) for play in vanilla Enemy Within Classic (+Not Created Equally and Hidden Potential) and Beaglerush's XCOM: Ironman Impossible, Seasons 1 and 2 of which are played in vanilla Enemy Unknown, and Season 3 of which is played in EW:LW3. Beaglerush also hosts Thursday Night XCOM weekly on the Twitch.tv stream he shares with his girlfriend, and there are several videos in the history you can watch.