I would definitely check out babyled weaning. If you google it, you will come up with a ton of info. Riley was a slow starter with solids, he was well over a year before he started taking significant amounts. I was nursing and he still had a night feed. I felt confident that although he wasn't eating much, he was obviously getting enough nutrition as he was growing well, meeting all milestones etc. Of cousre, I still worried from time to time. Some babies just do not go for pureed foods, they prefer finger foods etc from the get-go. Which might well mean they don't take in great amounts until they are older. At that young age, I really would not worry much at all.
Have you gone through the FAQ section of the board? What readiness signs was your lo giving to start foods?