I started in my back yard and got the dead grass to prove that I also a newbie to MDing. Parks and school yards are a good place that I have read. Try doing some research on old properties or places in your town.
One thing that I never expected when I started MDing is learning so much local history.
Hey Mazarelo I,m not to far from you. Out towards Coatesville. Your pretty close to York. York has a lot of old history. Try to get some old maps of your area from the library and do some research on your town. There's bound to be some old places around.