Welcome to Aquarium Advice
Well you're on the right track asking questions and researching first. I'll just add that do most of your research before you go out and buy anything. Tank size, lights, filters etc, can all change depending on what you plan on keeping in the tank.
Check our articles section (link at the top) there are a good number of very informative articles there. Be sure to read the one on the nitrogyn cycle, cycling your tank with shrimp (fishless cycle) and just about anything that sounds interesting.
Feel free to ask any questions that arise. I'm sure you'll have plenty. We'll do our best to help!