Greetings,
The voice you heard and the names you were given relate to the Lost Dungeons of Norrath expansion, which is a pretty good way at your level of gaining experience.
The original Adventurer's camps where you will find those named non-player characters are in the zones Butcherblock (just next door to you from G. Faydark), East Commonlands (in the tunnel linking that zone to North Ro), North Ro, South Ro and Everfrost. Recently, a new camp has opened up in Nedaria's Landing also.
As far as I remember, you have to visit one of the camps and speak to the appropriate named NPC. They will ask you some questions, the answers to which are all in the speech given to you by the NPC you spoke to in your home town. If you can't remember them, hit ALT-J to bring up your journal and scroll down until you get to that conversation. Once you've answered those questions, you're good to go on LDoN adventures and raids. Ask around in the zones with camps in them, I'm sure there will be plenty of folk willing to explain the details of the LDoN expansion. It is excellent for gaining experience, as long as you play at times where getting a group is easy. There is also a fair bit of nice loot available.
Hope this helps.