“When feeling confident, you can express gratitude and seek continued guidance from Allah.
O Allah, I am grateful for the confidence You have bestowed upon me. May this confidence be a source of strength and goodness. Help me use it to achieve success and be a means to serve You and others. Ameen.”
Here’s a simple dua in arebic
(Allāhumma yā) Fāṭira-s-samāwāti wa-l-arḍi Anta waliy-yi fi-d-dunyā wal-ākhirah, tawaffanī Muslimaw-wa alḥiqnī bi-ṣ-ṣāliḥīn.
“(O Allah), Originator of the heavens and the earth, You are my Protector in this world and in the Hereafter. Make me die a Muslim and join me with the righteous. (12:101)”
