Noob Questions, Just Options

[I_am_elf_hear_me_roar]

1: how can you kill the goblins in the sewers at godsreach easily at low levels

[The Metal Mallet]

I suggest chameleon spells. Since you're low level, you probably can't cast any long lasting ones so I suggest getting the Amulet of Shadows off the two women outside Gnisis. The one who asks you to fetch her ring in the pond. After talking to her, you can see an etherel person in Chitin walking around. Kill her and she carries the amulet.

That way you have a minute of being completely see through so you can attack without them attacking. But it's likely they'll just start running away. So invest in summon scrolls, probably Golden Saint or other high level Daedra and just let them clobber each other.

Either that or get good at marksman, and do the good ole shoot n' run.