How do I use Warlock spell slots before Wizard spell slots?

The number of spells you can prepare is called your spell slots As you increase in level as a wizard, the number of spells you can prepare each day increases,

This lets you recover a number of spell slots on a short rest, as long as those spell slots have a combined level that is equal to or less than half your Wizard

wizards spell slot If you want to cast either spell at a higher level, you must expend a spell slot as normal This allows you to both prepare more spells as well

slot true wallet +6 Hit Points · Select 2 Spells · Additional Spell Slot · Gain one additional hit die · Save DC is increases to 15 · Spell Attack is increased to +7