iamhouseholdsix on "adding live signature to posts"

I'm very new to wordpress. I am trying to figure out how to add my signature that I created using mylivesignature to my posts using the html feature. I cannot figure it out. Can someone walk me through it? And write it as if I were five please. :) Like... step by step, and where I would find everything. You have no idea how much this would mean to me. :) Thank you!