Thanks for reaching out!
The reason that you don't see "Resource" as a field - it is because resource is a a link object and not a field at the work item level. Resource is a link object between a Work Item and a User. Basically what you need to do is to create the task first and then have another action of "New Item" and select "Resource" as the item type. Then you need to specify the Work Item created (in your use case it should probably be NewObject1) and the specific resource (if it is someone specific you need to use their username within quotes).
If you want to get a better theoretical understanding of why Resource is not a field but rather a Link object I would suggest looking on Clarizen data model here: http://usermanual.clarizen.com/15-4-3-1-data-model
In addition you can always hop on to one of our Advanced Q&A webinars which are being held every Monday and Friday - http://www.clarizen.com/live-demo.html