After opening the account, they put me on vacation mode, and I can't make many changes to the store until it's back to normal. Is this normal?
Hi, No it isn't normal to be put on Vacation Mode right after opening. But we have no idea why Etsy did it, sorry.
ETA: Cryzalis's answer was a better one.
Etsy usually puts new sellers on vacation mode when they require more information. Check your emails including your spam folder, this often has to do with ID verification