As a father of two trying to work and go to school, I can empathize too. I'm sorry to hear about your 2 year old, we were very concerned about my son for the same reason but he seems to be more receptive to audial cues now.
Do you know if there are particular questions or sections that you are having the most trouble with? I've typically found that writing or typing out the questions and answers work well as your entire body is in on the learning process.
Let me know if I can help, I'd hate to see someone who put so much work into things let them go, it's possible you'll regret that for a very long time, or even worse - blame your dear children