What year was your 'what to expect' book written? Because they do seem to change the 'rules' all the time. My daughter (almost three) I started feeding at 5 months, because that's what seemed to be popular at the time, and her pediatrition said it was okay. Now I was told to wait until 6 months with my son, so I did. He took a while to get used to it. My son is now 8.5 months old, and I feed him three times a day - when we eat. He has 4-5 7oz bottles of forumla a day also. (I should add that my son is underweight, and I can't figure out how to get him to gain!I feed him all he'll eat!)
breakfast - 4oz infant cereal & about 4 oz of fruit
lunch - 4 oz of veggies
dinner - 4 oz of veggies and 4 oz of fruit
(one oz is about one small jar of baby food, or 3 of my ice-cube sized frozen cubes of homemade purees)
Plus he eats cheerios, those gerber puffed stars and pretzels. For about two-three weeks he has been eating table foods, because he has five teeth and is pretty good at chewing right now. I'll boil small cubes of carrot, he likes those, and he really loves watermellon, grated cheese, hard boiled egg yolk, soft cooked apple cubes. I also use a food mill to grind up some of our table food for him - like chicken stew and potatos and meat.
I don't know if this is all medically appropriate advice - but my son can handel these foods, and shows no signs of intollerance or allergy. He's constantly grabbing at food off our plates. I know children need a source of iron and protein by this stage, and the books I have say at this stage I can begin cheeses, most meats, egg yolk and he should be okay with a little dairy product *in* something, like a little milk mixed with mashed potatos.
Don't feel that you are 'behind' at all - forumla will give them all they need really for the first year, especially since your forumla would provide all the protein and iron they require. Some of my friends don't start their children on solids until 9 months or so! It's really just for enjoyment for them, not necessarily nutrition, and to give them practice eating. My son enjoys it, and it makes for a happy mealtime for everyone for us.
My son eats both fruit and veggies and enjoys them both, I even started with fruits! My daughter was the same. So don't feel that you need to continue to withold fruit if you want to add it, it won't necessarily mean he'll reject veggies.
Hope this helps.

DON'T doubt your instincts, and DON'T say you are a bad mom!!!