If you have the belief paraliminal I'd suggest you try that. You have pointed out that "me think it's too good to be true like everything else in life." This seems to indicate that thereare more areas in your life you are not getting the gains you are seeking.

If you only have the Personal Genius paraliminal use that. Put it in with the intention of being able to develop these skills, to find it easier to learn and grasp these techniques.

Yes in my opinion paraliminals can help you change your beliefs and remove blockages that are hindering your progress with these courses.

Alex