I want to try something a little different. I'm going to share a comic book with you of "The Fall of the House of Usher". This is in the public domain. This is the opening page. If the interest is there, I will add continuing pages weekly.
I suggest you read this comic book and think of ways you might change this story to make it your own. Yes you can use if as is but making your own story and maybe turning it into a book you can sell on Amazon can get you started as a writer.
In my opinion this is the way you should use the public domain. Comic books or books you can find at Gutenberg.org will give you plenty of ideas. That's sometimes the hardest thing a writer runs into - coming up with ideas