Welcome to the forums and grats on the scoot. There's quite a few things you can do to the Agility 50 to get a bit more pep out of it. Eventually you will more than likely want to go with something a little bigger I'm sure. I ride 19mi to work each way. I had a People S200 and stepped up to an Xciting 500, and I don't touch the highway the entire route.
Up at the top across all of the forums, there's a place you can use to search. Check that out for some of your modding bug. Couple recomendations to look at... upgrade the Variator, Exhaust, Carb, 70cc BigBore kit, rollers, belt, clutch/springs. There's quite a bit you can do to get more out of the Agility 50. I've read a few heaviliy modding hitting modders getting upwards of 60 something mph (GPS), but that's with some serious race kit upgrade parts.