Very unpopular opinion but building a social media following does not “sell stuff and make you rich”.
Yes, it might get the first few buyers. Or a first tens of thousands of buyers if you have a big following.
What makes you rich when you sell through social media, is trust.
Prajakta Koli has built trust. Book sales came as a natural outcome.
Seth Godin has built trust. Book and product sales come as a natural outcome.
Sahil Bloom has built trust through his discipline. People running to buy his books is a byproduct.
Build trust. Let people know you care for them. Sales are a byproduct no one would ever say no to.