I have an iPhone 6 and I can’t seem to find the icon that allows me to create my Memoji. Can anyone help?

Creating a Memoji sticker requires iOS 13, and therefore an iPhone 6s or newer. Creating an animated Memoji requires an iPhone X or newer.

(176243)

Memojis are not supported with the iPhone 6. They lack the necessary hardware for it (CPU/RAM and Face ID)

iPhone and iPad models that support Face ID, Animoji, and Memoji

https://support.apple.com/en-us/HT209183