Your downloading from Blizzards main wow site right? Can't really help as i never tried the trial version I just went out and brought the game but i do know that the patches were big at the start.
Try and join a populated realm so if you need help in questing there's always some player at the same level as you that will join. Pallies are always needed for groups. And if you want there are always low level guilds that advertise in game for new members that you can join that are aimed at helping each other level up. Anyways shouldn't be too long to go.
