Multiclass move question:  To cast spells like a wizard, is it just one multiclass move?

Multiclass move question:  To cast spells like a wizard, is it just one multiclass move?

Multiclass move question:  To cast spells like a wizard, is it just one multiclass move?  So for one move could a bard cast wizard spells too by taking Cast a Spell (wizard)? Or, would you have to take spellbook, prepare spells, and cast a spell (wizard)? I’m assuming the latter (3 moves to cast wizard spells).