No true Christian denies that Jesus is the second Person of the Trinity.
Seriously, if you’re unwilling to sign up to the Nicene Creed in some shape or form, why would you want to consider yourself a Christian? Isn’t that a bit like me wanting to consider myself a golfer, even though I don’t want to play the game that involves clubs, balls and holes in the ground? Or wanting to call myself an American even though I’ve no ambition to live there and certainly wouldn’t want to take the citizenship test?
For all your posts in this thread have told me, an agnostic who believes a particular named person probably did exist in the past; you don’t even state whether you believe any of his teachings to be sound, let alone whether you believe that you should apply any of them, philosophically or practically, in your head or in your daily life, or whether doing so would influence your relationship with God.
So I’ve too little information to call you a Christian, and I disagree with Polycarp’s evaluation; not because I am concerned not to lower the bar for application to this exclusive club, I hope you understand, but in the interest of the word “Christian” actually having some use and applicability. If mere self-identification establishes the identity, then the term is diluted until it is devoid of meaning.