I'm familiar with spirit animals, yes.

I've also heard several different definitions of them, and yours is no more or less valid than the others. Different strokes for different folks—er, furs, I say.

Same goes for basing your fursona on a spirit animal. It can be good for some, but it's not everyone's thing.

If you feel a deep spiritual connection to your fursona, or feel that such a connection is necessary, more power to you, my friend.

Take your time and search for the species that fits you best. But don't be afraid to test the waters with different fursonas, if you will. Experimentation is all part of the journey, in my opinion.