When not using ANY addons to WQ just click specific WQ @World map, close map, RMB the highlighted WQ and find group, if you want to start one, leave finder (back) and click start group - it will automatically fill all the description text fields.
While using WQTracker addon you are f###ed and you need to get to place of WQ, your WQ will appear in your quest holder then you can do what was said before for standard, addonless WoW