5e spell slots multiclass
The Abacus | Talesmith Tavern
Unlike other spellcasters, when you multiclass as a Warlock, you keep your Warlock spell slots and track slots for your second class separately instead of merging them.
dnd 5e 2014 - Can a multiclass sorcerer make spell slots for their ...
To multiclass in 5e, you need to level up at least once and meet the ability score minimum prerequisite for the new class you wish to pursue.
DnD Bard 5e class guide - Wargamer
Character optimization guide for the DnD 5e Bard's spell list.