Welcome aboard.
Definitely watch the getting started videos Sic posted. Between CWTN Plug-ins, Kiss Assist, and RG Mercs, it is rather easy to automate a 6-toon team.
The generic template for most groups is:
1) Tank
2) Healer
3) Crowd Control
4) DPS
5) DPS
6) Utility / aDPS
Tank choices: Warrior, Shadow Knight, Paladin
Healer choices: Cleric, Shaman (once the shaman is higher level)
Crowd control: Enchanter, Bard
Some folks prefer Bard if the 2 DPS slots are melee, and enchanter if the 2 DPS slots are casters.
Beastlord is a popular choice for the aDPS role.
I am not sure the current state of the Wizard, but if ports are important, the wizard could possibly fill a dual role of DPS and Utility.
Just some thoughts to get you thinking.
Be well. Happy boxing.