congrats on the exam, now study up and pass the general so you can actually use the radio... and leave the radio as is... it is a good little radio, but not worth spending any money on. I still have an old 728 and my experience with that radio is quite different than the other poster had. I keep it as a back up to my back up, to my back up to my radio.
The 746 the one guy talked about is also a good radio, I use one as a mobile in my farm truck.
Your radio is actually a very simple, easy to use radio... a basic model that will teach you to use a radio, teach you the basics, make you a better operator. Have fun.