Yes, you're right that they will know to which server you have connected (HTTPS has nothing to do with it), but they might not know which site you have tried to

Yes, you're right that they will know to which server you have connected (HTTPS has nothing to do with it), but they might not know which site you have tried to access because some servers will host many sites. Edit, to clarify: this depends on the protocol, as someone has noted further down, but in principle you could have an encrypted protocol in which case the ISP (or any other routing node) could only with which server you have exchanged packets.