As Adam announced on ubuntu-devel-announce Disco Dingo as entered Final Freeze.
Ubuntu 19.04 (aka Disco Dingo) and its flavours are going to be released this week (Apr. 18th) and now is a good time to test the ISOs to make sure that installation and core functionalities are working correctly.
Never tested an image before? Checkout the information on the wiki. You can sharpen your skills right now by testing the daily image. If you encounter any issues please don’t hesitate to ask. Don’t forget, you can talk in realtime on IRC on freenode @ #ubuntu-quality.
Testing on VMs is great but if you have spare hardware or a free partition, testing on hardware is a great source of information.