I would not say that Rod's tapes are not for learning.
They are simply designed to illustrate, often using humor, that the basic PPL knowlege is not all that you need to be a good, safe pilot.
If all you want is a cert, then the Gliem test book may be best. Some like John and Martha King. If you are a "visual" person, this might be your best bet. Jepp has (or at least had) video tapes that are good, too. So does Sporty's. They were more expensive than the King product if I recall.
You can learn a lot from Rod's tapes, and his books are designed to make arcane knowlege useful to the student. I would listen to Rod's tapes in the car while driving to work, just to spend some time with an experienced aviator and instructor.
On a personal note: your enthusiasm is great. Don't let it make you start to cut corners, or seek out the "minimum" level of knowlege. If you work slowly and deliberately, you can take in and retain more information. The retention is very important to you as a pilot.