Can you focus into focus and then resolve it too in the same action?

Yes.

As a general rule: you declare resolve <choosen side> dices. And you resolve them one by one - if resolving one dice suddenly turns another one to the side you are resolving you can do it (another example is Holocron - as you resolve its special and roll another special on the card you played you can resolve that one too or Datapad - if you resolve its special and turn other dice to special - resolve that too).