Congratulations on your relationship! I hear a lot of people in their twenties thinking they'll be alone for the rest of their lives, and it's nice to see proof that love can find us at any time.
My fiance and I moved in together last November. Neither of us had a lot of experience living with a partner and it was a really hard adjustment. I think it took about 3 months for the awkwardness to completely go away. When you live with another person, you both have to adjust your habits, and I think this is even harder for the person whose home you move into (always assuming you're not getting a new place where neither have lived before). We live in my house and I still do a few things that drive him a little nuts, lol.
Also, while it sounds counter-intuitive, you sometimes have to focus more on spending time together when you live together. It's easy to start losing touch with each other because you're not focused on each other when you're together the way most couples are before they live together. Your time together can cease to be special if you don't make an effort to keep it that way.
Really, though, if you really love each other and stay attentive and patient with each other, I'm sure everything will work out fine. Living with someone you love is a great way to live.