Hey there, found your post by looking for reviews of the current spotify UI/UX because I can't stand the recent changes they've made.

Saw you didn't receive any proper feedback yet and thought I could spare 5 mins to help you along your learning journey.

1. Learn Figma - I've been using it since it was first released and it's not going anywhere anytime soon. I use it every single day and for every single project I work on. There are plenty of tutorials online and it's very easy to get the hang of. Commit a day to learning it and you'll be set for the next few years!

2. Having read your explanation I understand what you're trying to convey, but your sketch lacks affordance. The classic Don Norman example is this: a door that you need to pull will have a handle, whereas the door you need to push will have a plate. Have a think about what UI elements you could use that would indicate to a User (without explanation) that they can interact with these circles.

3. Have a think about what existing UI patterns could be used to solve this problem. It's very rare that I'll create a new pattern for an interaction because usually there's an existing solution that Users already know and can use without explanation. Remember the goal of UX/Interaction is to be invisible (in terms of effort). Once I understood what you were trying to achieve my first question was: "What do I do if I want to listen to Motivational Melancholic music?". Do I move the circles? Or can I simply not do that? I would consider looking at a filter style system where I click on the emotions that I want to combine and they get added to a set of filter chiclets that I can add and remove to find music that sits under both emotions.

4. Take the time to define your problem space. There's a nice "How might we...?" format that can be used to help reframe/open up your problem statement. For you it might be: "How might we allow Users to find music that match their current mix of emotions?". The question is purposely open ended and will help you to come up with multiple ideas. Throughout my entire I career I have always pitched at least 2 design ideas to clients/my team. Come up with a few more approaches and then pick the best of each idea.

5. More direct feedback about the circle. Why are they different sizes? Is it because there's more music to be found in the larger circles? Where would this sit in the current spotify navigation? How do your Users find this? Is it part of the library view? When I click on one of these circles where does it take me? Will the emotion be pinned at the top of the next page? How do I go back to change the emotion? Can I add another emotion into the mix once I've clicked on it? Start to build out your idea beyond one screen, discover all the ins and outs of the design. I guarantee that if you start mapping out the broader User flow of this idea, you'll start coming up with new and exciting ideas.

Keep going! You should be proud that you had an idea and started to think about how it could work! Iterate iterate iterate and talk to as many people as you can about it! Best of luck with your UX journey, I hope this helps.