I like your skepticism, your questions, your curiosity. I don't want to just use words to convince you that innerwise is good. I would like to give you tools so that you can find out yourself what’s right for you.
When it comes to innerwise, I recommend:
The book YES NO, which teaches you the arm-length test.
I cannot recommend DARE TO B’RICHED Homo integer or DARE TO B’RICHED: Free Man to you unless your feelings or testing tell you otherwise.
When it comes to systemwise, I recommend:
Nothing! In this area, training is an absolute must before you can begin using these tools professionally. And anything less than professional will never do. You could start with the Imago Book to get to know this specialized topic and practice it.