First time mom but I'm about to be mother of two. Help.

My fiance and I are about to welcome our first into the world in July. Baby is very much wanted and we are so excited! My fiance also already has a son, who will be turning 7 in June. He has cared for him solely since the day he brought him home from the hospital (bio-mom hasn't once lived with or cared for him, sadly), until I moved in a little over a year ago and began taking on some responsibilities with the little guy. Well, these days in pretty much every aspect of the word I am mom to him, minus giving birth to him.​7 year old will be on summer vacation when the baby comes, so I will be able to stay home for awhile with new baby and 7 year old after fiance returns to work. It just makes sense that if I am home, he doesn't need to be at a babysitter or a daycare. I've read on a few different posts on here that the jump from one kid to two is easy because you already know what you're doing. Well, maybe that'll be true for my fiance, but for me this will be my first time with a newborn and trying to breastfeed.​What advice can y'all offer me on how to make things go as smoothly as possible during this time post-partum when our family will be adjusting to life with new baby? I know that I can physically handle taking care of both, but when things get rough what are ways to keep me from feeling overwhelmingly depleted mentally/emotionally? How can we help 7 year old adjust to having a sibling? Most of his life has been just him and dad, he went through a rough patch adjusting when I first moved in that we were able to get through, so I expect this will be similarly taxing on the little guy as his world and routine are going to be changing in big ways. via /r/Parenting http://bit.ly/2VJZpn9