Looking for an excellent UX designer to think of a good design and create mockups for Andorid/IOS app

Need to design a music video courses app for android and IOS, need UX design for it - something like udemy - but specifically for music. The requirements are 1. There would be multiple courses listed down in the app 2. On clicking the course, it would show us the contents of the video course along with our current progress 3. On clicking a lesson will take us to a video player and play out that video 4. There would be exercises at the end of each video - either MCQ questions or practice exercises showing some music tablatures to follow along 5. A video can be saved offline 6. There would be a leaderboard showing top 10 users based on some scoring 7. First 2 videos of each course would be free to view, rest of the videos can be unlocked by purchasing the course - need to design a payment dialog for asking payments through paypal - need to display whether payment was successful or there was some error etc - payments can be one time or subscription based recurring payments 8. There would be a discussion board corresponding to each course - with threads for various topics - people can mark any comment as helpful or not helpful 9. There would be a profile page listing all the purchased courses 10. There would be an accounts page listing all your transactions and subscriptions - and options to cancel out a subscription 11. There would be notifications when a comment of a user is marked as helpful - need to show unread notification count in title bar somewhere- and a list of notifications too If you are willing to do it please send out list to your ONE BEST WORK of your recent career and I ll make my decision based on that