I made my first solo flight in February of this year on my 16th birthday. It was in a Cessna 152, at Phoenix Deer Valley (KDVT) which is the second busiest airport in Arizona, and one of the busiest
GA airports in the nation.
I had about 15 hours logged, but about 30-50 non-logged as I had been flying with my dad since I was 12, but was unable to log that time.
It was really a piece of cake, even with the busy field. Actually, I get more worried around a non-towered field, as I am not completely familiar with it. I am much more comfortable at a busy, heavily ATC'ed field.