OK, I understand. As a basic suggestion, I’d try writing down ideas when you have them. I forget things all the time; everybody does. Do a voice recording or take a note on your phone when the idea hits.
It sounds like you are getting anxious about the way your writing will be received, which is a really common thing. You know, as an MFA student I taught introduction to creative writing. I had students from rural Arkansas. Some of those students–young men, generally–found the idea of writing poetry mortifying (they were there because they had heard the class was an easy A). And showing it to someone? Forget it.
I told them not to worry about showing it to people. Writing always starts as a low stakes activity. Nobody looks over our shoulders while we write (well, hopefully anyway). There’s nothing but time at risk. You can delete it, you can throw it away. There is no danger in writing for yourself. Which is how everything starts. Writing is seductive in that way–it invites us as a co-conspirator, and later we wonder who else might like it.
I have an MFA in creative writing, and I’ve published a few poems. I’ve taught writing. I may not be an amazing writer, but I have written a lot of stuff over the years. Nobody has seen everything I’ve written, because I don’t want to show everything. Some of it is not good enough, or else it’s too personal. Whatever. I make that decision after the thing is written. There’s no need to worry about other people in the beginning, because showing my writing to people is a choice I make when the writing is done.
I give myself permission to write badly.
You can’t revise, polish, or improve a piece of writing until you have written something that needs revision. You don’t know that until you have something in front of you. Try not to worry about showing things to people when you don’t even know if you’ll want to revise it.
I think it is good for a writer to be obsessed. It’s motivating, and I usually enjoy writing more when I have an obsession to chase. But I can write without one. Writing is a skill. It’s not magic; inspiration doesn’t descend on wings. Practice and commitment go a long way. The more you write, the less you will fear it.
Write for yourself. If you decide to pull others in later, you can do that. But other people really don’t have a part to play at the beginning of a project. Leave them behind.