Try and get a hold of the book, FROM THE GROUND UP.
Might be particularly of help since you're at the...
give me a basic knowledge that could later be built upon during flight/ground training?
...stage.
You'll get a general idea of the kind of subjects you'll be handling at later stages during your ground training,....kind of gives ya a bird's eye view.
The MECHANICS OF FLIGHT by AC KERMODE has been and will remain a trusted friend of many a pilot, but you might want to read at a later stage....and oh yea, everytime you read it, you have a different perspective of aerodynamics!