Advice on going from having only one baby to #2 soon??

I am almost due with our second child and don’t know how anythings going to work with my toddler :,( I feel like how can I give him attention he needs? How can I do everything for him if I’m tending to a new little baby? He’s 2.5 years old and very clingy to me. How do you go from 1 to 2?