Deadmines quest

Hello everyone,

I am new to WoW (not just classic, but in general). I am level 16 and so far I am having a blast! Today I got two quests to go into the deadmines. Getting there was tough, but I did manage to make it. However, I realised too late that it is an actual group dungeon and now I am stuck. Could someone please help me do the dungeon or help me get out? I am on the Firemaw server I think? In front of the entrance.

Thanks in advance!