What can my ISP provider actually see when I try to lookup a domain using DoH on my browser?

I'm trying to understand exactly how a HTTPs connection works among other things. However I'm not 100% about what I think it actually is.

\-> As an example, I have DoH on my browser if I go to the following website "[https://www.reddit.com/r/privacy/](https://www.reddit.com/r/privacy/)", my ISP knows I asked my custom DNS server to lookup a domain, right? Will it know the exact domain I'm at? I'm aware my ISP knows it's "[reddit.com](https://reddit.com)" because it had it's response from my DNS to …

browser change doh domain https isp privacy request search search engines things understand website websites