Leticiar:
I am currently working on a project to build a automatic door opener.I would like to use a face recognition scanner to unlock the door.
...And I want to build an automatic door opener.
...I want to use voice recognition.
....This is my first time ever working with Arduino or in fact coding...
I would like to say that seems like a mission impossible...
Try to break it down into parts, arduino's nor forum members are magical gnomes that present ready to use solutions.
Start at the beginning.
Files > Examples > Basics > Blink