Putting aside the safety issues (I think that point has been covered) congrats on getting your feet wet. I had one instructor session before I "broke the law" and flew by myself. It was a blast, but not as much as the next 3 lessons (which was all I got). I have dumb thumbed a few planes, but I learned what a stall was and ehat to do when flying into the sun, but they were electric and no instructor around. I CAN say that my trainer is in the same shape it was when I bought it and I attribute that to my instructor. By no means am I a great pilot or anywhere near the pilot I want to/should be, but I plan to change that by hooking up with an instructor. I figure no need to re-invent the wheel. If you can, find someone to teach you.
If it is not possible, find a place where you can concentrate on flying.. not dodging cars and people