Advice is Greatly appreciated!!!

Autumn
I'm due beginning of Feb, my toddler son is going to be 2 beginning of Jan. My worry is that because he is still being breastfed to sleep, and briefly around 3am and 6 am to go back to sleep, (he still sleeps in the bed) that he'll have a really hard time when baby is born and needing my attention! I honestly don't know how to begin to wean these nighttime feedings! He is my baby and it honestly makes me sad for him, I don't want him to feel sad and have a hard time! Any mommies have any same experiences? Advise on how to get baby to be a little more independent? Advise on how to teach baby to self soothe without going cold turkey? Thanks in advance for your time!!!