So many things could have gone wrong that would have made it unflyable.
I'm guessing, based on what you posted, that you missed a few things. TO Config, for example. Did you press the TO Inhibit button? I'm guessing you didn't, otherwise it wouldn't have gone off. You probably took off in GRD OPS mode. Did you push the condition levers all the way up, and not in the detent just before the max position? If you did, you will not reach takeoff speed. What were your engine temps? What was your torque setting?
Those are just a few possibilities.
There is a tutorial included in the documentation. This is a very complex aircraft, and the tutorial will help you get used to it. Once you get used to it, you could start up and take off within 5-10 minutes.