Are there any limitations as a single user of Adobe Connect, if so, what are they and how do I get "full service." I'm planning training webinars once per month.
The limitations of what Connect will do is tied to the licensing purchased for the account.
When you say you want full service, what do you mean? Are you just using live meetings? The Webinar/Meeting functionality of Connect is the same, irregardless of what licensing you have. The licensing around the live portion of Connect will limit the individuals who can hold live sessions and/or the number of people that can be in a live session.