Under your User Icon in the upper right there's a Menu that includes “Home Page”.
Select that link. Initially your Home Page is empty so you need to edit it to make one.
On the Right Select “Edit this Page”
On your user page create a Wiki link for your new page like:
[[playground:My New Wiki Page]]
When you have a final page you can move the text into a [[wiki:My New Wiki Page]] link using
Cut and Paste Methods
Save the User page
Click on the “My Page Title” link
It will open a black page that you may now edit with new content
The page will exist in the playground while you are working on it
Moving it out of the playground should probably be discussed here