Hey,
I just did a full setup following this tutorial: http://mattstauffer.co/blog/laravel-forge-hosting-on-aws
It's very straightforward.
You create a new server on Forge using custom VPS and setting the info. Save the command he gives you. Then you login to your AWS console and make sure your security group allows connections from 0.0.0.0 o HTTP, HTTPS, MYSQL, SSH.
Then you login into your VPS as root and run the command for gave you and the server will start provisioning. After that, just use forge. =D