hi DragonLord:
Racing nitro cars might give you nimble fingers which helps... but it's still two dimensions. RC flying is three dimensions and that' the main differences (besides the wind and that strabge thing called gravity tha tends to aim flying objects to rocks and other hard places)
Take it easy for the first training exercises.. fly two or three mistakes high which means enough altitude for you or your instructor to recover the plane safely.
On your first day probably you will be doing a lot of circles and rectangles and approaches towards the landing strip
then you'll progress towards take-off and landing
The tiem requierd will depend on your skills or the ability to gain more skills
Happy Flying