Hopefully you two will get more replies, but you may need to play around with the settings to get it just right for your child. Focus on the sections that your child enjoys and skip the others for awhile. Then gradually add those sections back in. I think many people try to do the sessions at separate times of the day...Ex. Session 1 in the morning and session 2 in the afternoon. If your toddler seems bored during the second session, maybe try skipping the second session and go straight to the next lesson instead.
I know that my toddler does not like too much repetition. She only likes to see things once or twice, and then we have to move on. We are doing Reading Bear, and I only show a lesson once. If I do show it twice, I have to separate it by at least a day or two.
Also, try to keep it exciting! Make sure the sessions are kept fun. If your child isn't into it, then maybe try doing a lesson on your own while he is in the room and make sure to be excited while you go through the lesson. Most of the time, the child will show an interest in what you're doing.
As for seeing results, it really does vary. Some kids are eager to share what they know, and others are more reserved and show what they know in their own time. Typically, it seems that toddlers are able to share what they know more quickly, but definitely try to just focus on input and having fun bonding with your child