I have a 6 month old DD who is formula fed. I’m not sure exactly how much she weighs now but she’s petite. She has 6oz bottles. She can’t sit up by herself but she can roll around, nearly crawl, and can hold her head up.
We started “weaning” her at just over 4 months, MIL gave her rusks, she had porridge and the odd baby jar here and there but she didn’t seem ready so I’ve stopped until now.
My plan was to this week give her breakfast each morning then next week breakfast and lunch and the week after all 3 meals. This morning she had baby porridge with a Mamia fruit pouch mixed in. I don’t want to use pouches and jars all the time so I’m going to blend some of our meals and offer her finger foods. I have a few questions though so I’m hoping someone on here can help me 
Is it possible I could under/over feed her?
Do I start offering her water? And if so when?
Can she eat meat? My HV said spaghetti Bolognese with the pasta cut up small is good finger food
Should I move up to the next stage milk?
Also, I’m scared of her choking so is it safe to give finger foods/more solid foods if baby can’t sit up themselves yet? She can for a few seconds but not long
TIA