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I used a jQuery for the making the page more interactive by changing the background colour of selected rating. Is that effective way to do it? I donot know much about jQuery and just learning it. Can it be done in more effective way? Does investing time in learning jQuery effective in long run? Are any alternatives used in real-world? Also, is my practice of using landmark tags effective? What are the changes can I make to optimize my code?

Regarding the responsiveness, how much is my solution responsive? How can I learn to build a better responsive webpages and web applications? Are there any resources that could help me learn that?

Also, how could I make my code better ? Is the way that I use the div tags correct? What's the proper usage of div tags in real-world applications?