With respect, How have you just got your licence back if you don't understand basic airspace rules?
Yes, you can go over (at a min height) under (a stub at max height) etc.
But I suggest you spend a little time with an instructor to brush up .
The Yanks get very very iffy if you go overhead their runways,(plenty of them in my neck of the woods) and knowing the old addage of shoot first and ask afterwards ,it pays to know the rules!