So, addiction to Udemy does actually exist?? Well, thank goodness someone has to say it because I thought I was alone on this and also do feel ashamed!
Anyway, I am in this same position of where I have learned through so many tutorials, yet when it comes to starting to build it on my own, I go into freeze position. This is mostly on JS by the way,
However, I found another JS tutorial course, which did actually help me. Yes, it was boring when having to learn the concepts (because I have learned them far too many times), however, the instructor made one good point at the beginning of the course. He noticed that every time he sees a JS tutorial, they will teach the basic concepts of JS and when it comes to doing a tutorial project, they are too advanced or too big to learn, especially it gets overwhelming when it is encouraged to do it on your own as a challenge.
So, what the instructor did was doing only one project, which is to do a todo list and use as many concepts, that had been taught. This is exactly what helped. Yes, this means another tutorial, but for me, it was a starting point to start doing something small on my own and gradually build it up from there. Because of it, I learned to do a simple create-your-own-sandwich-filling project by myself (boring, I know)