Dear miriamkg
You should always start step by step and only for very short sessions with your child...there are some infant stimulation cards in the downloads to start with first before the words...check them out
As for the words + images, it depends what you want to do.... Images show the child the meaning of the word he reads...you can mix both (with and without images) for variety and right brain stimulation of your child...
Or start with words only and when your child is bored add images so you can keep him/her engaged...
From what I understand there are no fixed rules
All that matters is that the learning is fun and loving and not boring for your child
Noha