Do you guys know any websites for writing? (we make and post our own writing like short stories)?

I think what Eugenie said about "Google Docs" just might work for ya!

Google Docs: Free Online Documents for Personal Use
https://www.google.com/docs/about/
But there some more also.

Commaful: Beautiful Short Stories At Your Fingertips
Medium – Read, write and share stories that matter
Wattpad - Stories You'll Love
Nojoto App: Write Quotes, Record Poems, Shayari Videos
Poemist - Poems and Poetry Platform

Wattpad

I saved this but I have not checked it out yet so do some due diligence before posting anything. Check their TOS, etc.
[media=https://www.wattpad.com/]

As far as I know, I've never, ever, had any of my works stolen. I mean really, nobody could ever pass themselves off as me. 👍🤭🤔🤗😁😎😢

Wattpad

What about 'Google docs'?

Wattpad is okay, deviant art has a wide spectrum.

Quora maybe???

WordPress is a good one

Archive of our own

If you want to make sure that what you write is not stolen then creating a blog on wordpress is good. If you want to share and get feedback and also run the risk of your work being stolen wattpad is good.