Except when Christ states that he was “alpha and omega”, he himself translates the meaning as “first and last”. It dovetails real nicely with John Chapter 1....”In the beginning was the word(logos)....”
Christ was around at the beginning and he’ll be around at the end...and he’ll be around always!
Please understand I was only speculating and basing this on my own thinking. Your description is the correct one per scholars and theologians.