Breastfeeding??

Natalie • From London, England UK expecting boy/girl twins june/july ❤️😊
Hey mums out there and mums to be any advice on breastfeeding? Best positions, how many calories do I need to eat to make enough milk, tips and how to get the most out of the experience? 
Currently pregnant with twins and want to breastfeed them for the first year if I can I didn't with my first and regret it x
Many thanks x