I don't know if I feel like a guy, or feel like a girl. I only know that I feel like a kid. Would that make me agender?

Gender isn't something innate. Don't stress trying to 'be' or 'feel like' something. Just do what's most comfortable for you! If you wait and think on it and come to the conclusion that you're agender or non-binary or cis gender non-conforming, you still have a loving community waiting for you.

Agender has been described to me as a coat. Sometimes you put on the girl coat. Sometimes the boy coat. Sometimes the coat is a mix and sometimes you don't bother with the coat at all. Basically gender is an accessory. If this describes you, you might be agender. Off the top of my head, I can only think of one other gender identity that says one isn't a boy or a girl. Non-binary is when one does not feel like a girl or a boy. This post isn't to try and tell you what you are or what you aren't. You know yourself better than anyone else. So, explore all sorts of identities. Try out different ones until you finds one that fits. And don't ever feel like you have to stick with a single label or that you can't change a label. Gender is a spectrum and it's okay to go from one end to the other. In fact, if you don't click with any labels, you don't have to have one. You're allowed to be you with or without a label. ~Ellianna

If you don't feel like a guy or a girl, but simply as a person, and gender is not something relevant to your identity, then it sounds like you are agender. However, how you identify is completely up to you, you can choose whatever label seems to fit you best, and you can express yourself and your identity in any way you prefer.