Get the basic rotation flowing first and then from there you can start weaving in the Opener and when to blow your cooldowns. The BASIC rotation is Fire 3>Enochian>Fire4>Fire4>Fire1>Fire4>Fire4>Blizzard 3>Blizzard4> then repeat from Fire 3 (Remember you're going to have to cast Enochian again eventually but try to get the point where its off cooldown by the time you need to cast it again). Go to a target dummy and get this into muscle memory asap, then from there you can start working on what you want your opening rotation to be and when to blow your big cooldowns like Sharpcast, Raging strikes, convert etc. Its worth noting that Thunder seems to be mostly useless unless you lose Enochian because of boss mechanics (knocked back, stunned, tornado'd etc) and have to resort to your old rotation in 2.0.