You're not old at all! I'm 54 and have been in braces for the past 18 months. And this is my first time!
Trust me, most people won't notice cause they're more focused on themselves. You may get a comment or two from another adult braces wearer and that's always fun to share "war stories." And before you know it, they'll be off. My time has flown by and I only have about 8-9 more months to go.
Good luck and keep us posted on everything.
Marilyn