Breastfeeding questions

Sammy • Soon to be 21, been a mother to my little man since age 16. I am engaged to the love of my life/highschool sweetheart & we have our miracle girl on the way! Due St. Patrick's Day!
I am expecting baby # 2. Wanting to try and breastfeed. Never tried with my first. Need advice on how to start, what kind of pump is best to use, any information would be very helpful!