You're at the right place. The folks here will all help. Of all the questions I've seen here, I cant say that I've ever seen a dumb or stupid one. I doubt that you'll be able to come up with one either. We all want to see you succeed and will do all we can to help you do just that.
Taking your time and doing the research (as you are) is the way to go. If you aren't sure, ask. Also, I hate to say it (but have to) don't take the word that you get from your LFS as gospel. Better to go in knowing what you want to do and what you need than to just listen and follow their advice blindly.
A good staff at a good store will try to help but remember they are there to separate you from your cash. Just a word to the wise.
You may want to start out by letting us know what type of tank you would like to have. Fish Only, Fish Only With Live Rock, or Reef. That will let us know how to better help you.