You just get more responsibility and are more liable for things. That's pretty much it.
You're not an adult yet other than the legal definition.
It's going to take some time before you find yourself, but if you were artificially limited in pursuing that due to age restricted things (getting an apartment, signing a loan, etc.) then now you have the tools to go find yourself.
But I'd hurry, not sure how much longer the world as we know it is going to last.
