You need to select a kit in addition to selecting a class. Write your kit's name in the "class" field on your character sheet. Feats are OK. You can't multiclass outside of your kit. I.e. in addition to all ability score requirements, all of your classes also need to fit your kit.

The kits are kinda like backgrounds because they include starting equipment and a special feature or benefit. Tool proficiencies, the corresponding kit, and flaws, traits and ideals are still missing so we need to fix that somehow.

• Human (PHB)
• Dwarve (PHB)
• Elf (non-drow) (PHB)
• Gnome (PHB)
• Half-Orc (PHB)
• Half-Elf (PHB)
• Halfling (PHB)
• Genasi (Princes p 227, or the Elemental player's companion)
• Bugbear (Multiverse)
• Goblin (Multiverse)
• Hobgoblin (Multiverse)
• Kenku (Multiverse)
• Kobold (Multiverse)
• Lizardfolk (Multiverse)
• Orc (Multiverse)
• Tabaxi
• Fairy
• Hexblood
• Dhampir
• Ardling (but not form that plane; instead created by the enchantress Deino on Dabab Island)

In your spell card bag there are also the elemental spells. Very appropriate for al-Qadim. Some of them were reprinted in XGE but there is a whole deck of the elemental spells. It works similarly to the XGE spell card deck in that there are symbols for the various classes.