Inspiration is the most important thing when learning to code. Do what excites you. Without that fire, you are going to burn out when things get difficult. Try to build whatever sounds fun to you, and see how you can incorporate what you're trying to learn into that. Afterward, you can learn a lot by trying to optimize your project!
Always strive to gain a deeper understanding of your tools beyond their applications. When you read specs and source code you'll become more familiar and be able to write much better code.
- Take 30 minutes to dive deeper and try to understand how a tool you use works under the hood.