You can sell a single piece of content — an article, file, course, video, knowledge base — or an entire segment. Create a product, enable paid access, set a price, and connect payment methods — your product is ready to sell.
A segment can also be a product: this way you can sell access to the cabinet as a whole and set up a subscription for a set of content.
If you need paid access to a segment — How to set up paid access to a segment?.
Next, create a landing page and bring in customers; if desired, embed a sales button on your main website.