Welcome to the .org!

Regarding your request, if I understand correctly I think that you may find consulting the manual more rewarding than gathering those bits of information you need from diverse posts all over the forum. But in case you prefer the collected wisdom of these pages (oh my!) , try the following reads:

https://forums.totalwar.org/vb/showt...t=31445&page=8
https://forums.totalwar.org/vb/showthread.php?t=32726
and, for the units,
https://forums.totalwar.org/vb/showthread.php?t=31444

have fun!