Creating a message to URL composer [urgent]

I want detailed help on how I could code my website so that: It’s a one page site where upon entering it, you could write a message/text (can include pics) and at the end, you click ‘Compose’ and a URL link is generated, anyone who enters that link just sees the message. (Minimal design required/no registration no nothing/ just an accessible/practical text version of Imgur if that delivers the idea to you)

Create a dedicated collection and a dynamic page item to hold the messages.
On one of your site pages, you can create the form for inserting the text/pics. When you connect the submit (‘Compose’) button, choose the navigate to the item page when successful.

Check for more information.