beast wrote:I'm going to start my twin engine/instrument rating course next week with piper seneca 3, any tips or advise for a beginner like me?
Since you probably would have had at least 150+hrs of flying i don't think you should regard yourself as a beginner.
Read up basic theory of flight stuff on asymmetric flying, propeller torque effect, lateral stability and the rest based on inputs from your fellow seniors at FA.
Instrument rating part will basically extend what you have been doing during the single engine (IF) sorties. With added items on how to fly SID and STARS, airways flying, fine tuning the previously learned instrument approaches like VOR/DME, ILS and NDB.
Towards the end you will also be trained on flying instrument approaches with an engine inoperative since its one of the requirement for your IRT to carry out at either one precision/non-precision approach with an engine out.
Can't say much about the Seneca3 since I was trained on a different type of twin eng a/c.
Wish you all the best and enjoy your twin engine flying.