Are there more layouts that I can use? Is it possible for me to create my own?
Yes more layouts are coming out of the box. To create your own, assemble widgets onto a page and then download the page. From there you can make any changes to layouts or other customizations. You would need to host the page yourself using this approach.
A ticket was created to track the request for new layouts. You should have gotten an email. The ticket will be updated and you will be notified via email when new layouts are available.