Need feedback

I am a beginner who recently completed a small course on web dev. I came up with an idea to make a flashcards website for students with lots of features and a good design but I don’t know how good this idea is. I tried searching online but everyone was giving repetitive ideas. It felt like I wouldn’t benefit anyone by making something so many people have made. I wanted a review on my idea or any other ideas that anyone might want to recommend.