https means that URL is known?

Hello,

when i visit https://somedomain.com
and navigate to some subpage on that domain, my internet provider can know that subpage URL or title and only thing that is encrypted are that webpage texts, images + submitted form data?

or ISP do not even know which domain i accessed at first place when i used httpS ?

I think it will make more sense to you if you read this:
https://en.wikipedia.org/wiki/HTTPS