I'm slowly trying to build up my collection. While I like the benefits of cast iron, I know I'll slip up and not be able to maintain one. Then enameled cast iron swoops in with bright colors to the rescue.
You won't slip up, just don't let it rust, which is easy. Dry after cleaning.
You can use soap. It's fine. Don't believe people who freak out. It'll be ok.
A small dash of soap, a brillow pad, scrub, then some oil to finish it, ez pz.
I seasoned it when I bought it by peeling a bunch of russets, throwing the skin in with a bunch of coarse salt and veggie oil. Brown the skins, stir constantly. Get the oil and salt everywhere using the skins like a mop. Once browned, wipe out and store.
I treat mine like described above, and mine are extremely non stick, durable and ez.