/lit/ - Literature

I'm in desperation
Been trying to get into this writing thing for quite a while now, maybe two years or so, and I'm unable to even reach the fifth chapter of any project I start.
I usually have an idea, chew on that idea, and then decide to commit and jump in to writing about it. But I always lose focus and rewrite it all three chapters in, or have another idea and start another story.
This cycle can repeat forever, to the point where I have like twenty folders in my writing folder, each dedicated to a ``book´´ that I'm ``working´´ in.
How do I stop this bullshit and start writing, I genuinely think that I have good ideas and that competent novellas can come out of my mind, but I'm unable to even write one.
I've tried recently to drop writing on my computer and grab a pen and a notebook and write in to it, the fact that I cannot go back and edit something makes me value more what is written and bound me more to what I'm working in. Is this a valid start to break my block?