Weaning Baby

Does anyone have any advice for weaning? I am starting to introduce goat's milk to my 11 1/2 month old and he will take a sip or two but he doesn't seem to like it very much. I'm concerned about him because he doesn't nurse for very long when he does, which is about 4 times a day and once at night. He likes water, but I'm just not sure how much breast milk he is getting and concerned about his fluid intake (he is not dehydrated, but sometimes his diapers are more yellow than clear, and he sometimes will go 4 hours without needing a diaper change because he is not that wet. I want to wean him about his 1st birthday but concerned for his lack of wanting to drink milk. I don't have a pediatrician yet, so...I'm just not sure who to talk to for advice. He is happy and healthy overall and seems content after nursing and eating...I just don't feel completely at peace with how things are with his liquid intake.