Need help creating a page that has editable fields

I am creating a new website for an organization that offers writing classes. One of the most important pages on the website is a “class page” which provides the information about a given class (name of the class, description of the class, date, time, price, location, etc). The old website’s “class pages” are in the format of a Post. To create new class pages on the old website we currently go to WP Dashboard Posts, click on ‘New Draft’ under any given post, and then edit the post title (name of the class), post body (description of the class), and the date/time/price/location. The title, body, date/time/price/location are then automatically populated into the newly created class page. Easy peasy. Here is what that process looks like for the old website:

OLD WEBSITE: WP Dashboard Posts Click ‘New Draft’

OLD WEBSITE: Edit Post Title and Post Body

OLD WEBSITE: Edit Date/Time/Price/Location

OLD WEBSITE: End Result

At this point I need to recreate the backend input functionality of the “class page” for the new website. I downloaded the Yoast Duplicate Post plugin to make the ‘New Draft’ link show up in WP Dashboard Posts, but when I click the ‘New Draft’ link I am taken to the page shown in the second photo below which allows me to edit the web page itself, rather than to a page where I can edit the Post Title, Post Body, and date/time/price/location. I need to find a way to get to the page where I can edit the post content. How do I do that?

NEW WEBSITE: WP Dashboard Posts Click ‘New Draft’

NEW WEBSITE: Being taken here

A couple questions:

1. Is the method that we are using on our old website the most efficient way to post new classes? If not, what is a better way to do it?

2. If the old method is the most efficient way, how do I go about creating a Post page template that will allow me to edit the name, description, date, time, price, and location fields on the fly as we are doing on our old website? Once I have created the Post page template, how do I get to the page where I can edit the post itself rather than the web page?

Thank you!