Is that correct approach? if not please let me know the details. Also let me know, anyother useful iso image/testsuites - if you feel that needs more attention. thanks!
It is the correct image to test. This is a daily build so make sure you use the latest image. Then you can report your results to the QA tracker. Use the Focal daily until Beta and Final milestones are published.
If you’re new to the QA tracker you can read the main documentation or watch the presentation screencast on the Ubuntu Wiki or go through the step by step walkthrough.