Bataco -
Nothing you've done so far is wrong per se, but I think what you're being told is it could be somewhat better. We all know you're itching to be interactive with your snake. After all, you didn't buy a potted plant; you bought a pet.
BUT... please keep in mind this this is really a baby. He can become overwhelmed with stimulus, and that can cause stress which would then lead you down a path that you don't want to go. Trust me and anyone else who has been there.
Your Cali will be with you for the next decade or more. I know you're excited, I know you're eager to have the full snake ownership experience, but more than anything else (assuming all the husbandry things like temps, hides, security, etc are good, and I know they are), your snake needs to have time to become comfortable, confident and feel secure. Limit your handling to not more than 5 minutes at first, and only one or two days between feedings, allowing for the 48-72 hr Rest & Digest period. That's plenty enough time for him to begin to recognize you as something that is not a threat to his life, and that your hands become a safe and secure perch, if you will, to begin seeing, smelling and experiencing things outside the confines of his viv.
A little patience now and for the next few months will pay enormous dividends for you in the future.