How do I evolve from intermediate to advanced level as a web developer?

I have been following Angular2 from past 5 months. In the process, I read lots of blogs, watched youtube videos and recently took udemy course.

I kind of understand the concepts and have built some smaller apps like todo list etc. Most of this I have done watching videos.

My problem is I run out of ideas on trying to build something from scratch on my own. I end up following youtubes videos for help and ultimately I feel not having learned anything. It's like I end up doing more passive learning than active learning.

Any advice would be helpful :)