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From the ONAP portal, login to the VID application using demo user, browse to locate the demo SDC Service Models, and Deploy an instance of the service you created - not the pre-populated demoVFW.
(Note: deploy your "service" above - not demoVFW or demoVLB - these 2 are leftover pre-population artifacts of the init script and will be removed)
Use the generated demoVFW above (you don't need to onboard/distribute your own)
Fill in the information (Instance Name=DemoInstance, Demonstration, vFW) for a Service Instance as shown below and press Confirm.
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