Hey Giri,
I think I understand what you’re trying to do and the good news is that it should be much easier than you think.
For the index page you can use a dynamic category page that is setup via the URL to show the all properties of a single user. You can set the property name to link to the dynamic item page described below.
For the update item page you can use a dynamic item page with the dataset set to the Read & Write mode. Add a button to the page to save the edits to the item.
Now the trick is to send the user to the dynamic category page so that it shows only that user’s properties. You can do that by getting the current user’s info with the wix-users API, building the link to the dynamic page, and using the wix-location API.