Daxos is a great option for an Orzhov enchantment commander, providing additional value to each enchantment, providing access to a means of weaponizing each enchantment cast
It has not one, but two great introductory products for new players, it has its main set which is jam-packed with amazing cards (reprints and new), and it even has its own Jumpstart product
Alandra, Sky Dreamer Alandra, Sky Dreamers abilities work really well together and give you a clear roadmap of how to build a deck, which is always a great quality in a commander
(The battle's protector doesn't control the battle, however.) Any player other than the battle's protector can attack it the same way they would a player or planeswalker, and its protector can block creatures that are attacking the battle
Tapped creatures can't block, and can't use any ability that also requires them to tap they're effectively 'sleepy' until the next turn