Oh the spelling...arrrgghh...
Alright, lte's start with a downloadable owner's manual. You can get it from the
Uniden website. That should show you how to enter frequencies correctly.
Next, let's consider whether you are using the handheld walking about, or in a fixed location (or maybe even both). I'm not too familiar with where you are, but a good rule of thumb is that if you're more than a couple of miles from the airport, chances are good that you won't hear the tower and ground operations. The best you could possibly hope for would be the approach and departure frequencies, depending on where you are in relation to the various routes to/from the landing and takeoff strips. With a good antenna, you will likely hear the aircraft checking in with the local airport's approach and departure controls, but again, if you're more than a couple of miles away, the chances are that you won't hear the airport's reply.
I mentioned having a good antenna. Like any antenna that comes with a handheld, that little thing you got is not very good at VHF air frequencies; it's very lossy, quite the compromise. To increase your chances, you need to do better.
If you're using the handheld in a fixed location, a ground plane antenna is very easy to build; get it up HIGH and feed it with a good coax cable, and the range of the aircraft you hear will improve. As for carrying it around, a better antenna for the handheld (often referred to as 'rubber duck' antennas, or just 'duckies') will also help, though not nearly as much as getting the antenna up in the air.
If you're interested, I can turn up the formula for the lengths; there's nothing difficult about it, and it's a great place to start - you won't damage the scanner in any way, and it's a great beginner project. 73s Mike