The login link or url to log into WordPress is normally located at:
if you have installed WordPress in a sub directory or at leat the administration in a sub directory. FYI, sometimes an admin will create a custom login link. This is for example possible with iThemes Security. In that case it will be the domain followed by a subdirectory of your or the admin’s choosing.
Login details to be added are your username or email address followed by your password. If you forgot the password you can click on the “Lost your password” link to get an email to reset the account and regain access. There is also a Remember me checkbox you can check to have WordPress remember you, but most of the time you can have the browser store the details too.
And here is the actual video for you to watch: