Am i correct to say this is correctly punctuated?

wading in the shallow water, courtney found dozens of interesting seashells.

Find a newspaper or magazine (either print or digital form), and select one piece of media to evaluate. after reading/viewing the media, describe it, and explain what you believe the purpose and intended audience of the piece may have been. then, label the techniques (images, layout, video, sound, etc.) that were used, and how those techniques interacted to create either an effective or ineffective piece of media. your response should be at least 200 words.