Allow Users to Add Products

Hi,
I’m a begginer at WordPress who is developing a website that uses a catalog. I’m currently using this plugin for that matter and so far it’s working fine. However, there’s one aspect that I find missing and which I don’t know if it’s possible to do with this plugin.
I’m perfectly able to add products from my “/wordpress/wp-admin” page as an admin. However, I don’t know how to allow a “normal” user (a user who isn’t an admin and cannot edit the page) to also add products. I want to allow any registered user, after the login, to add products using a page of the site. For example, I could create a page named “add products” to which this user could access and then use a form with fields such as “name”, “category”, “long description”, etc. These products created by this user would then be added to the rest of the products and would be visible to all users.
Another thing that I would like to know if it’s possible is creating a custom page for each user in which each user could have his own products catalog (a subset of all the products) that is visible only to him.

Note: For user roles, I’m using the plugin called Ultimate Member.

The page I need help with: [log in to see the link]