First rule of writing - don't make your character names so similar. For a second I thought Glendolyn was undertaking training with herself, then I noticed the one letter difference.
First rule of blurb writing - your blurb needs to answer what the character's goals are, the thing that happens to upend the character, their new goals, and what happens if they fail.
First rule of cover design - it needs to convey genre and catch the eye when it's placed amongst all the others in it's genre. While the cover you have isn't bad in design and layout, it doesn't say urban fantasy. Think image of a young woman with glowy hands on a city sidewalk or down an alley. Maybe with a cat at her feet.
You seem to be entering the series name as the book title and I think that may confuse customers. The title is supposed to be entered first in the book details, then the series title in the space that's labeled SERIES. If you did that your books would show up on the sales page as Summer: The Legacy of Dolyn Book 1 . The way it is, it looks like you have two books with identical titles, and some people may think that's odd and pass them by. More interesting titles would also be a good idea. Summer and Spring won't grab anyone's attention.
Also, the biggest words on a book cover are usually the title words, not the series name. There are exceptions: Books by bestselling authors often have the author's name in huge letters because their names sell books and some well-established series are eventually reprinted with the series name in big letters because the series name is the big selling point.
That said, free book promotions tend to work best when you offer only the first book in a series for free. If people enjoy it, they're likely to buy the second.