How to create an “add to cart” button

Hello,
I installed Woocommerece and would like to use it to sell my digital products. However, I cannot figure out a way to do that. I tried watching tutorials but there’s nothing that actually answers this question. Plus I’m missing the Woo button in the visual editor and I don’t know if it even still exists.

I just need a simple “add to card” button that leads to a checkout page and I need to attach multiple files to the purchase. Anyone know how to do this?

thanks!