OP, I know how you feel. I too recommend the Doctor Sears book as overview and introduction. I was never lectured, but I got raised eyebrows and snippy comments from nurses and one resident (not counting the military doctors, they were awful, but they never succeeded in making me doubt myself, instead I knew right away those guys couldn't care less about my child's health, only about their ego and power trip). THe more I researched and learned, the better I felt. For me age was a huge factor. Apart from a serious outbreak of something I consider dangerous enough (e.g. a chickenpox outbreak wouldn't phase me), I would have considered to vaccinate below 24 months. But otherwise no. That's the big thing we concluded. The next step was which diseases do we want to vax for, at what interval and what brand and how many doses. We e.g. choose way less doses than "required". The kids had one MMR and excellent titers. A 2nd MMR would have unnecessarily burdened their systems.
After Dr. Sears I recommend to google the package inserts of the vaccines you are considering. Read up on their efficacy and titer levels after 1/2/3eg doses. You'll be amazed how little doses it takes for most people.