Seize the day?

You are correct as far as you've gone, but there is a bit more available to you.

Turn Structure:
1. Draw a spell card then cast spells. *
2. Select an army card & cast spells. *
3. Summon (if a planeswalker was selected) & cast spells. *
4. Move selected figure(s).
5. Attack with selected figure(s).
6. Cast spells. *
7. End of turn - Increase turn tracker, discard to 7 cards, then player to the left takes their turn.

* You may cast up to 3 spells during your entire turn and only if your planeswalker is still on the battlefield.

You might choose to cast the spell before you've selected what army card you will activate.  Then you would be able to move 1 FIGURE of a squad and make an attack if you choose.

You might use your PW to summon a squad, attack with your PW and then cast the spell to move and attack with 1 Figure.

Or you might activate, move and attack with a squad.  Then cast the spell and you might choose to activate a figure from a different squad OR you might activate one of the figures again from the squad you just finished using.