Hi Little Guppie and Welcome to TFF!
In my opinion its a great stroke of luck to have stumbled across this forum prior to having actually bought equipment or started "doing" the hobby! The members here are lots of fun and always willing to lend a hand and talk with you - in my own case I've really enjoyed it. There are lots of beginners who are in the same boat, which makes it nice and there are also some folks here who have lots and lots of experience in the hobby and can offer great tips!
As Si says, have a read in our Beginners Resource Center. In particular, your first assignment should be "The Nitrogen Cycle", The Fishless Cycle and the Fish-In Cycling situation. Those lay the groundwork for the core of the hobby. Then there should be a great article somewhere by Miss Wiggle on general startup topics and of course lots of other great articles. Meanwhile, as Si also mentioned, take a look at various other beginner threads and join in the discussion if you want to! Follow the fishless cycling threads of others can be a great way to get a feel for the range of things happening.
In truth, every little topic can lead to a huge bunch of detailed discussion, tank size, filter type, lighting, substrate, all sorts of stuff.. but its also good to know that its OK to be a beginner and just make some decisions and move forward without getting too stuck!
I hope you enjoy your stay at TFF!
~~waterdrop~~
