need advice for feeding, mommies!

hi mommies, I need help with my 8 month old boy who is EBF. we started on solids at 7 months since he was not interested in solids or the bottle. now that we have introduced pureed sweet potatoes, cereal, and couple other vegetables he is still not eating more than 2 tablespoons a day. he seems very interested in food when we eat but doesn't eat more than a couple spoonfuls of his own food. he seems hungry and interested but won't eat anything I offer. he starts crying if I try tonspoonfeed him. I just don't know what else to offer but pureed food and cereal. what books do you advise? what kind of food should I try? Oh we also still breastfeed 3 or more times a night still.