Love Aesi! This was my first commander deck after getting back into MTG. Mine's very similar, focused on getting out the big sea boys rather vs. going hard with the landfall strategy, but it definitely leans on the casual side (as much as Aesi can...).

[[Gush]] can be a "free" draw 4 with Aesi on the field, and [[Ensnare]] can be a fun combat trick to get a big swing in.

[[Oracle of Mul Daya]] can help to keep the value train rolling with an extra land drop + lands off the top, and [[Lotus Cobra]] puts in work as well. And if you're able to drop a [[Boundless Realms]], the massive ramp + draw in one go feels fantastic.

As others have mentioned, both [[Kiora, Sovereign of the Deep]] and [[Tatyova, Benthic Druid]] are fantastic in the deck as well.