Welcome to the Spartan fold

. I think you will enjoy Firestorm Armada, it is a lot of fun and the models have only been getting better.
As for your question, that is correct. As is common with most naval games, any weapon system on a ship with a valid target can be fired, at different targets if desired. Essentially, it is like "Power of the Machine Spirit," except it applies to all weapons not just one

. Also possible is splitting fire; if you have one weapon that gives you 6 attack dice, you could elect to shoot 3 dice at one target and 3 dice at another.