- Think of a few interesting ideas to build
- If you don't have any, just pick a simple marketplace like business (say Airbnb), and start replicating it in the no-code tool of your choice
- You could build the app in Bubble and design the entire site in Webflow/Wix
As @jakub_piskor said, you'll learn the most by doing. The idea doesn't really matter.
1) Have a project in mind
2) Do a research of no-code tools based on your project, i.e. can I build my project on this tool?
3) Pick a tool
4) Start building a project - you'll learn most by doing it
There's no shortage of options for where to start with no code. But for beginners, I think the best place to start is with something simple and visual. That's why I recommend Undaku. With Undaku, you can quickly create powerful apps without any code.
https://www.undaku.com/