Breast feeding help (still pregnant)

Alexa • I am 25 years old. I have 5 beautiful babies ages 7,6,5,3 & a angle to watch over me! We are expecting baby number 6 in June 2016 if everything goes as planned!!!
I am a full time student and have to do my clinical rotations on a schedule just like work. I am wanting to breast feed but I'm not sure how to go about it. I want to introduce the bottle soon after birth because I'm not going to be able to be there to feed him all the time. Can I pump and couple weeks before I have him and start storing it?? My milk always come in 2-3 weeks before I gave birth. Is it OK to do that or do I have to wait till he is born?