Hi Jason,
Just started my first brew a week ago today, I am also in the same boat as you with a reading of 1020 after one week and no sign of bubbles from the airlock.
I'm brewing the Aussie Draught kit @ 19 liters, the temp in Melbourne has been cold so my temps have been getting down to 15-17c which I suspect has caused my yeast to pack up for the winter.
I have given the brew a stir and chucked a heat pad underneath to get it back up to a solid 18-19c, will take another gravity test in a few days and see if this has made any difference.
This first brew hasn't gone to plan but at least it has given me a better understanding of how temps and yeasts work.
Good Luck!
Rhys