Our company has an existing Jira site (cloud). We are very interested in Jira Service Desk and we have tried to add it to our existing site. We currently use Jira for logging tickets and we need a customer facing solution.
When selecting 'Looking to add JIRA Service Desk to an existing site?', it takes me to an error page that says I must sign up for OnDemand before configuring an OnDemand instance.

From what I read here, OnDemand no longer exists https://www.atlassian.com/blog/archives/goodbye-atlassian-ondemand-hello-atlassian-cloud
When I select the link for signup for OnDemand, it just brings me Atlassian's Product page https://www.atlassian.com/try
What am I doing wrong? Is there a workaround? We're pretty confident about this option, but I would like to trial it first before committing. Help!