is there any possibility that you could perhaps borrow
some filter sponge or media from your friends tank ?
as that would really help .
and don't worry,everyone starts somewhere,
i cycled my tank with fish in the begining,not
knowing there was another way.
you are on the right path now,and keeping up
with water changes will Really help your fish.
the cloudiness probably is a bactieral(sp) bloom,
it will go with time.
oh yeah one more thing(i do waffle alot)
once you are cycled get some more corydoras,as they do best in
a larger group.
i'll shhhh now. :)