+1
You can do a small scenario or the tutorial to learn the system and when you feel ready dive in a play say Caesar v Pompey which is the biggest scenario...
I used to play total war games religiously, shogun 1, MW 1 and 2, after that I tried a ageod game, Napoleons campaigns... and I was converted, real strategy without swamping you and without those what I found boring after a while TW battles.
You will find ageod games make you think and they will surprise you by how much detail they have in each scenario, and they manage to do this without being to hard to learn and without swamping you, likes been said above try the demo and see what you think
