There are some things about changing your last name that you don't find out until you're in the midst of it.
1. You'll probably be looking through your wedding photos before your passport comes.
Changing your name is going to take time, it doesn't happen overnight. It is always best to be over prepared and have several documents ready and take then with you everywhere you go.
2. Your marriage certificate will get more views than a viral video.
Everyone and their dog will want to see your marriage certificate. Do yourself a favor and order multiple certified copies from the state. You'll want to have it attached to your hip, because the second you leave it at home is the second someone will ask to see it. Think of it as the equivalent of taking your wallet everywhere you go. Also consider scanning and having a copy in your email as you'll often be asked for a digital copy to email/upload.
3. Your new signature won't be perfect.
Your new signature isn't going to win any type of award. Give it time for it to feel natural and look pretty.
4. Your identity might be questioned.
With all the changes you will be making it is likely your new credit card will be the first thing that shows up, even before your new driver's license. Just be sure to carry around your marriage license in case someone doesn't trust that you're a newlywed and still waiting on your new drivers license. Especially when booking travel at the airport! Make sure to book in whatever name is on your license!
5. You may miss your doctor's appointment.
It will take you a while to get used to hearing your new last name. So when you go to the doctor for the first time it may take them 10 times to say your name before you realize it's you. Don't worry, you'll get the hang of it.
Why it might seem overwhelming at first, you'll adjust. Plus you'll probably have a blast saying your new name!