I Was Born as the Seventh Prince, What Should I Do?

In rare cases, there are children that have reincarnated while holding the memories of their previous lives. Dependent on the god’s caprice, they will be reincarnated into another world. One such case is the seventh prince of a certain kingdom.
The eldest son is the crown prince, the second, the third a diplomat, the fourth is bewed to the princess of another country, and the fifth and sixth are geniuses in music and art. Wait? Then what’s left for me?