Compose Multiplatform provides a unified codebase for Android, iOS, desktop, and beyond, but what is it really like when you start building your first app with it? As a fresh face switching over to Compose or Kotlin Multiplatform from my current setup, I have discovered the experience is full of surprises and wanders: tooling issues, debugging, platform-specific problems, and the excitement of seeing one UI finally take shape everywhere. During the course of this presentation, I'll present my real experience of starting with Compose Multiplatform: what succeeded, what failed, and what I would have wanted to know ahead of time. We'll see the initial setup errors I encountered, the difficult aspects the tutorials leave out, and the little secrets that simplified things for me. No matter if you're a Compose Multiplatform newcomer or just thinking of applying it on your subsequent project, you'll leave with a thorough understanding of the fresh developer obstacles and how to sidestep them , so that you can waste less time debugging and devote more time developing. Key Takeaways: 1. The most common setup mistakes beginners face in CMP projects 2. Debugging challenges across Android, iOS, and desktop — and how to deal with them 3. Practical tips that tutorials often leave out 4. How to avoid beginner obstacles and save time in your own project