The only drawback with FOW in my opinion is that the rule book seems to be all over the place. When we first started to play we would stop to look up rules only to find them in a totally unrelated section - Morale, Commanders, Snipers etc. However if you are just using tanks from the starter set you should be Ok as i think you will find that the tanks are the simpliest to understand.
Rember the modifiers for distance and armour aswell (Because we didnt pick the armour one until late in the game.)
Also be aware that when you add in infantry and artillery the game opens up vastly and is even more fun.
The best way to learn I found is to play as much as possible so if you ever get down to Redcar on a thursday give me a call and Id be happy to give you a game - you can even borrow an army
I have found FOW to be the most fun game I have played so far so I hope you enjoy it mate.