Now that you've learned all the biofeedback techniques, I recommend that you choose one or the self testing techniques that you feel most comfortable with and practice his daily practice when you go to the supermarket practice whenever you can, so that it will become a craft it will become something that you have you become confident in with the answers you get. The other technique is the muscle testing technique. Now it's really important you keep practicing. It is a technique that some people become frustrated always. I want you to really relax with this because this is the tool that's really important. This is the tool that will give you confirmation.
Just know that it does take time and practice. It takes a lot of practice. However, when you when you learn it, and you confident in it, you then have this amazing skill to find causes to find information and to resolve issues. So good luck.