OK, I logged onto Facebook (Step 1). Now what? What is ‘In the promotion in your Feed’? I did a crtl+F on ‘promo’, and didn’t find anything. So there were no ‘suggestions’, nor a search box.
Whenever I’ve had a birthday coming up, Facebook asks me if I want to set up a fundraiser in my main feed. That is probably what those instructions assumed was going on.
It turns out that I didn’t have to go out and create it. Something appeared in my feed just now to set up birthday donations, and I just chose the charity. (I chose Cats of San Bernardino, who do amazing work, with a goal of $200. I raised $101 for them last year.)