The first one
One product.
One person.
The first sale isn't a marketing problem, it's a specificity problem. One thing, priced honestly, sent to the person who already asked you about it.
Start with one thing
A catalogue can wait. One product is a store.
Send it to someone
The link works in a DM as well as a bio.
Watch what happened
Views and buyers per product tell you whether it was the price or the page.
Free plan keeps your link page; selling needs a paid plan with a 14-day trial.