If I remember you correctly you live near Williamsport right? Lycoming County has some beautiful riding! go check out the Williamsport bicycle club and inquire about beginers rides. Most clubs have organized rides on a regular basis for new riders. I think that it really helps to be out with other people, it motivates and gives you a clear goal in a group enviroment.
In Jersey Shore there is the Pine Creek Rail Trail which is 60 some miles long. You can park your vehicle and ride on the trail as far as you want on the trail which is almost perfectly flat. If you make a habit of this you can build up your legs, base milage, and shifting techniques in a safe enviroment before you tackle the streets.
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