Good luck in you search Angel, and welcome to the BikeForums and cycling. I can't add too much
to what's already been said.
If you're not sure what type of cycling you'll be doing, you can start off with a relatively inexpensive
(but good) bike and either upgrade it when you have more experience, or you'll have a better idea
what you need for your next bike, without having invested a fortune.
Check out several bike shops, as they'll each have different bikes and you'll learn a lot just from
the shopping around and talking to people. Also by visiting different shops you may
run into a bargain, but be aware of a shop selling you something just because they
have it in stock.
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"...perhaps the world needs a little more Canada" - Jean Chretian, 2003.