Help a noob understand the airport setup and get the taxiing tutorial going

I have no idea of the marking in the airport runway, taxiway etc. Where do I learn about reading the numbers and signs on the tarmac?

I am trying the tutorials. Stuck with taxiing one which keeps repeating that I should release brakes and move even when I am faltering around. Also keeps saying I am going in circles when I am just following the road straight ahead of me.