“Kinning” is not a good word to use. It implies that being otherkin is an active choice, and has probably contributed to people thinking we made a conscious decision to be this way. You wouldn’t say that you’re “red hairing” when you have red hair. It’s just something you have. Kintypes are the same. Think of it this way:
“I’m a readhead” = other-/fictionkin
“I dyed my hair red” = copinglinkers
“I prefer red hair, but I’m not a redhead myself” = otherhearted