Find a local Esperanto group and go to their meetings. We're all pretty welcoming and most will be glad to help you boost your conversational skills.

Also, if you are in the States (or not), check out NASK (Nord-Amerika Somera Kurso). It is a week-long course which takes place across July 4th weekend each year, currently in North Carolina. That is how I built the bulk of my ability. I highly recommend it.