If you want to learn more about TW tactics I'd recommend to watch some youtube videos to get a grasp. When I watched some I played so much differently and started to make up my own play style.

Welcome to the .Org and I hope you have a good stay here. (I don't browse here too often anymore but I will check in on activity once in a while)

You can also read up on guides here, the RTS by froggy still can apply to M2tw.

I'm not sure if I can help you on battles as I have an habit of inviting new players and destroying them. Online battles might help you but they're mostly on RTW, NTW, and Rome 2. Shogun 2's is left with mostly the exploiters, etc and sadly there is no large fund battles. (Balance between medium and huge)

As always, I hope you enjoy TW.