Occult Spellcasting

You draw upon magic from esoteric knowledge. You can cast occult spells using the Cast a Spell activity, and you can supply material, somatic, and verbal components when casting spells. Because you're a bard, you can usually play an instrument for spells requiring somatic or material components, as long as it takes at least one of your hands to do so. If you use an instrument, you don't need a spell component pouch or another hand free. You can usually also play an instrument for spells requiring verbal components, instead of speaking.
Each day, you can cast up to two 1st-level spells. You must know spells to cast them, and you learn them via the spell repertoire class feature. The number of spells you can cast each day is called your spell slots.
As you increase in level as a bard, your number of spells per day increases in level as a bard, your number of spells per day increases, as does the highest level of spells you can cast as shown in the Spells per day table.
Some of your spells require you to attempt a spell attack roll to see how effective they are, or have your enemies roll against your spell DC (typically by attempting a saving throw). Since your key ability is Charisma modifier.

Heightening Spells

When you get spell slots of 2nd level and higher, you can fill those slots with stronger versions of lower-level spells. This increases the spell's level to match the spell slot. You must have a spell in your spell repertoire at the level you want to cast in order to heighten it to that level. Many spells have specific improvements when they are heightened to certain levels. The signature spells class feature lets you heighten certain spells freely.

Cantrips

Some of your spells are cantrips. A cantrip is a special type of spell that doesn't use spell slots. You can cast a cantrip at will, any number of times per day. A cantrip is automatically heightened to half your level rounded up, which equals the highest level of spell you can cast as a bard. For example, as a 1st level bard, your cantrips are 1st-level spells, and as a 5th-level bard, your cantrips are 3rd-level spells.