shyness/jittery - normal?

Hi there.

I'm new here - but I have a few questions about my Ratties. :?:

Since I've got them home yesterday and set up their cage,
they've been acting lethargic. I imagine that's because I look
at them mostly when my light's on (I can hear them running
around at night!).

The friend I got both of them from (both PEW males,
5 weeks old. ), has been handling them since they
were just tiny babies... So when I pick them up they
don't bite me or anything... They just don't seem
happy to go! >.<

I was wondering wether or not that was normal ... and
curious wether they'll eventually warm up to me. :x
Usually when I handle them they make a straight dart up
to my shoulder (which is awfully cute) .. and they
seem pretty happy to stay there.

Maybe I'm just worrying for no reason! lol ..
I'm still so new at this ... >.<

~ Kathryne