Hello.
I have a task to block social networks and make a redirect to "my page".
The page can be both on a remote resource and on a server in the local network.
I read about HTTPS, Proxy and so on. I understood that it is impossible to redirect to my page because of HTTPS protocol, is it so?

Yes. HTTPS is encrypted. Web Browsers will throw all kinds of errors if you try to redirect or intercept. You can try to block based on the TLS SNI field, but many more modern sites encrypt also that. Check "tls-host" parameter for blocking https://help.mikrotik.com/docs/display/ROS/Filter