Administrator account is not for general usage, and NOT your own account.
Administrator account required password to access.
Usually, no one use Administrator account.
Do note the differences between "Administrator" account and "admin" rights.
Administrator account have full rights to anything and everything.
"Admin" rights is just act as administrator and is not an account.
As the 1st newly create account (mainly your own account) may have that admin rights.
With admin rights, you are accessible to create accounts for other users.
Also for guest account, by default have no password.
Guest account is always available, but need to initiate it for use, and no password is needed.
If you create guest account, it will not be a guest account, and this will be another user account, but the name "Guest" may conflict with the system created "Guest" account.
In conclusion, you may started the wrong way.
So, if your had manually create an Guest account with password, it is not a guest account at all.
But an user account with the name "Guest".
When you activated the Guest account, there will not be any password.