u/DryLingonberry6466

I've never really been a player until recently, I've always DM'd.

I've made a Fairy, Wizard/Bladesinger.

My questions are:

1. Can I not change the legacy Fairy Spells to the Modern spell versions?

2. Should something happen when I take a use of Bladesinger? Should my AC go up, my attack bonuses change for my weapons,

3. Should when I cast mage Armor it apply that to my AC.

4. Should when I cast a shield it apply that to my AC.

5. Shouldn't when I cast Shadow Blade that appear in my Attack actions.

I've had this sub since day one, and have nearly $1000 in books and never notice these most basic features are missing? Or am I expecting too much after using high quality VTTs?

Or am I not doing something right? Is there some toggle in missing?