To find your magazines link go to "My magazines".
Then click on the little arrow on the right side and choose "View"
You will get the preview link to the magazine. You can either share that link or the direct link you receive by clicking on the "Read" button.
Another possibility to share a magazine is through the "Share" button directly.
In the full link you could also replace "view" / "read" with "fullscreen" in the magazine URL, which displays your magazine without anything around it.