Congratulations!
And what a beatiful family!
Now the nitty gritty....
Of course all babies aren't the same so I'll speak purely from my personal experience.
My son NEVER SLEPT THROUGH THE NIGHT until he was almost 6 months old. Yup. True story. People tried telling me to force him onto a schedule (ya...NO. Didn't work), ignore him while he's crying and he will eventually stop (uh, bullshit...AND I couldn't go through with it).
There were the first few months when I seriously thought to myself "I'm never going to sleep again" as he was up virtually every hour on the hour wanting to be on the boob. After a while we both adjusted and I kinda cherished those long nights because it was just the two of us hanging out.
I did find he liked movement, be it rocking, or me holding him and humming in his ear with my cheek pressed to his cheek, or putting him in the car and driving him around the block. I always had some kind of music going, and oddly enough...during the day I could get him to fall asleep when I vacuumed the house! (He's now 10 and can still sleep through a vacuum cleaner!)
Good luck and congrats again!!!