Note that seasoning cast iron has nothing to do with flavor. It refers to the coating that develops after seasons of use. The primary benefit is that it prevents rust. A very nice side effect is that food tends to stick to it less. Seasoning is best accomplished in a controlled environment, but it's also fine to just start using it (with oil) and lightly clean without soap after use. Eventually, it might start to develop a useful coating in key areas.
I steam clean it (hot water + hot pan + stiff brush), then back on the stove to dry off and apply a light layer of avocado oil.
Leave it shiny on your stove and ready for next use.
The important thing with cast iron is to clean it immediately, before you've started eating. But this is actually pretty easy because steam cleaning is so effective and cast iron is really durable.
It takes about 30 seconds to clean it and rub with oil.
