hey don't sweat things out with avenue yet--
for me, i don't have any courses up yet... avenue course stuff works and is maintained through TAs (for the most part, iSci is obviously an exception for everything), and TAs will not be officially active until next week.
I would wait until then before trying to use Avenue.
There is also no rush for Science 1A00, you probably won't do any labs on the first Thursday/Friday of school, so you can wait until that weekend to do it.