A few questions for you ladies

Sorry I wasn't quite sure where to post this but I have a few questions for you ladies. My baby is 6 and a half months old and ebf. We introduced solids around 4 weeks ago, he currently only has solids once a day around dinner time. So my first question is how many times a day/ how many spoonfuls should I be feeding him solids? I feel like I should be increasing the feeding by now but I'm not completely sure. Question number 2: Should I be offering him water in a sippy cup between/during feeds? and if so how much? Is it possible to give him to much water? I did ask the nurse this question and she said since he's breastfed he doesn't need water but it's really hot where I am am this just doesn't seem right 🤔. Question number 3: Can anyone recommend a good starter sippy cup for a 6 month old? TIA 😊