These are great questions, but there are no easy answers. CreatiCode is a much more advanced version of Scratch, so you will have to learn the basics before creating complex projects.

Can you start with the tutorials on this list?

https://www.forum.creaticode.com/category/17/tutorials

 
You can build some simple projects by following these examples, and then ask more specific questions about what you would like to do, such as how to modify one of these projects based on your idea.