Dua is calling upon Allah. We can ask for guidance, forgiveness, knowledge and good for ourselves and others.
Three places to begin
Quran 20:114 includes a supplication for an increase in knowledge. Quran 2:201 asks for good in this world and the Hereafter. Quran 17:24 teaches a supplication of mercy for parents.
A moment to reflect
What is one thing you are grateful for today? What would you like to ask Allah for? You do not need to share your personal answer publicly.