Logging in

Just add

/wp-admin

to your URL.

To clarify, that's the root URL of your site.

In some cases WordPress could be installed in a subdirectory,
in which case the root URL would be:

example.com/mywebsitefolder/wp-admin

When you log in, it's best to click "Remember Me" if you intend to come back.

If you're using Google Chrome web browser, also save the password when prompted.

And if you forget your password, just click "Lost your password?".

You can then reset your password via email confirmation.