create the display of specific paid articles

Hi, I have a problem, so I would like to create the display of specific paid articles, and I thought of first creating the article, I create it as a product for the payment part but I don’t know how to connect it with the article., That is, after the user who purchased this product only that specific item for that product is visible, and this for each item and product, automatically also the part for the roles I would like to separate the basic role i.e. the non-paying one from the one who has paid for the purchase of the item, can you help me