I'm probably going to get a gazillion negatives for this but why would you want to share your writing ideas?
99% of writers fail to write anything of significance. Writers fall into two categories: (1) hobbyists. These people want to discuss their imaginary worlds with others who have also constructed their own alternative worlds which they can retreat into. (2) Professional writers: these people earn their living; ghost-writing, script-writing, speech-writing. This is what they do feed their families. Why would they want to help you eat into their slice of pie?
Personally, I've got 100 plots that are all good that'll take time to convert to stories - time that I'll never get back.
Real, established writers are a select group. Stories are not their 'babies'. They'll sit outside cafes drinking coffee. One will say they've got an idea for a story about a female US Muslim president. The others will tell the writer, "That'll never fly."
And they'll move on to the next idea.
Your idea that you want to share is not that special - trust me on that.