You’ve learned secrets from various magical traditions. Whenever you reach a Bard level (including this level) and the Prepared Spells number in the Bard Features table increases, you can choose any of your new prepared spells from the Bard, Cleric, Druid, and Wizard spell lists, and the chosen spells count as Bard spells for you (see a class’s section for its spell list). In addition, whenever you replace a spell prepared for this class, you can replace it with a spell from those lists.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.