Welcome to AA
Bad advice from the LFS
that told you to wait 24 hours. In my signature, you'll find links to fishless cycling and understanding the nitrogen cycle. You should read those and get an understanding of what a cycle entails before even thinking about getting any fish.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry