It is "Mostahab" to begin Duaa by praising Allah, then pray upon the Prophet, peace be upon him, then to ask what you wish:

The Messenger of Allah (ﷺ) heard someone supplicating after his prayer without praising Allah and without supplicating Allah for the Prophet (ﷺ). With regard to him, the Messenger of Allah (ﷺ) said, "This man rushed." Then he called him and said, "When any one of you have performed Salat (prayer) and wants to supplicate, let him praise Allah first then glorify Him in the beginning and then he should supplicate Allah for me. Then he may supplicate for whatever he likes." [Abu Dawud and At-Tirmidhi].

Also Umar bin Al-Khattab narrated:

"Indeed the supplication stops between the heavens and the earth. Nothing of it is raised up until you send Salat upon your Prophet." Jami` at-Tirmidhi 486

Allah knows you did not know this before, so I hope your previous Duaa is OK.

It is "Mostahab" to begin Duaa by praising Allah, then pray upon the Prophet, peace be upon him, then to ask what you wish:

The Messenger of Allah (ﷺ) heard someone supplicating after his prayer without praising Allah and without supplicating Allah for the Prophet (ﷺ). With regard to him, the Messenger of Allah (ﷺ) said, "This man rushed." Then he called him and said, "When any one of you have performed Salat (prayer) and wants to supplicate, let him praise Allah first then glorify Him in the beginning and then he should supplicate Allah for me. Then he may supplicate for whatever he likes." [Abu Dawud and At-Tirmidhi].

Also Umar bin Al-Khattab narrated:

"Indeed the supplication stops between the heavens and the earth. Nothing of it is raised up until you send Salat upon your Prophet." Jami` at-Tirmidhi 486

Allah knows you did not know this before, so I hope your previous Duaa is OK.