Did you use the upgrade kit/rules? I haven't got into mine in years but just bought the upgrade and wondered if it made the game a bit more easier to understand.
I never had the original so I never tried to get through those rules. These I hear are better laid out, but I'm still primarily picking it up by watching several of the YouTube series online. Both Chris Hobbes and CounterAttacks are really good.
From there a I've referred to the rules and needed.
The Fields of Fire Bootcamp has been useful with some nice strategy tip articles.