OMD it's flipping brilliant. If it's any consolation, I first lived alone at c28, 26, can't quite recall. I was a very sociable person and many expressed concern at my idea. I was concerned too, tbh, but it had to be done.
Anyhoo, the first week I was so busy I barely even registered that I was on my own except to note that it had flown by.
by the end of a month, I thought "how the hell can I give this up?" It's fantastic. You live however suits you! It's great. You can have visitors whenever you like, you have all the space to yourself, you have peace and quiet whenever you like. When you get home after a crap day, your rage goes away because all you have to do is something that makes you cheer up! It's so fun!
Music choice all yours, no other people bringing friends round or making a racket. Total autonomy. Fab.
I don't want to intimidate you but as it sounds like you are already worried, I will say this. Make sure there's food in the freezer for everything from when you have a cold and can't face going out, or just when you've been socialising too much and run out of food! Also make sure there's basic medicines in the house because it's annoying to find yourself with a shocker of a headache and have no one to send out for pills.
but tbh this is stuff I do anyway even living with someone so it doesn't intimidate me or feel like a chore.