Hello Josh..
Welcome to fishlore!

A 55 g tank is a great size and your choice of fish after your cycle are many!
Have you read up on the
nitrogen cycle? Also there are great articles here for starting up a new tank and cycling with fish. I cannot give you the link, but if you search the first page of the forum especially here in the
FW beginners guide you will find the information you need.
After you have read up on this, Im sure anyone here would be happy to answer your questions.
Happy Reading!

And good luck with your tank.

~ kate