Is my action correct when I sneeze alone and praise Allah, then wait for a moment, believing that the angels will respond to me, and then say, "May Allah guide you and rectify your state of affairs"?

We hope your response to the angels is correct. If a man sneezes when he is alone, he should say: "All praise is due to Allah, Lord of the Worlds," and then say: "May Allah have mercy on us and on you." Indeed, whoever hears him among Allah's creation will respond to his sneeze (by saying "Yarhamukallah"). It has been narrated from the Prophet, peace and blessings be upon him, that when a servant says: "All praise is due to Allah," the angel says: "Lord of the Worlds." And when the servant says: "Lord of the Worlds" after "All praise is due to Allah," the angel says: "May your Lord, Allah, have mercy on you."