Hi kamikazepanda and welcome to the forum
It sounds to me like you're just starting out with fish and are looking for some very basic information. That's good!
There are a lot of very friendly fish folks on this forum who just love helping newbies get started in the hobby. There is a lot to learn and this is just the place to do it!
If you are just starting, and don't have fish yet, take your time, ask all the questions you want and learn as much as you can before you spend your money. This will help you get things right the first time and makes it better for you, and for the fish, too.
It would help, however, if we knew a little about you and what you have in mind. Do you live in the US, the UK or somewhere else?
Are you on a budget or is money no object?
Do you have any idea what kind of fish you want, or are you open to suggestions?