Hands on Arm PSA API and Zephyr

I would need a specialist in embedded programming that can developpe a simple code accessing the PSA API on Zephyr Os (on windows 10) in order to read and write lines of text in the Trust Zone of an Arm processor such as the nrF5340dk. i would need a simple code really well explained in order to reproduce the methodology to access the secure area from the non secure one. I would like to read and write into a secure level 1, and also write into a less secure area level 2(aRoT)
thanks