Just in the spirit of learning I am studying how to add voice commands (Alexa) to ESP32 projects.
1- I have tested the fauxmoesp / espalexa libraries.                                                                                    (WIFI)

2- I have also made a small test with Arduino Alexa Skill  Arduino IoT Cloud with Amazon AWS                (WIFI)
3- I would also like to do a test of a gadget with AWS using BLE.                                                                (BLE)
   
    For me the Amazon information  is a bit confusing.  I started to register and they asked me for a current account number. I could be my fault …

      I would appreciate any information
                   a) Technical (tutorial with the steps to be done)
                   b) Economical about the costs this approach may entail.
                       Both from a student point of view and if it comes to professional use.
      I found the Arduino IoT Cloud information more transparent.

Thanks in advance for the hints!