Think in themes, not only in emergencies.
Patronage matters, but it is only part of the picture. A saint is not just a solution label. Each saint also reflects a way of living: discipline, tenderness, repentance, simplicity, perseverance, or brave witness. Sometimes the best recommendation is not the saint attached to your emergency but the saint whose life shows the virtue you need in order to face that emergency well.
Use one saint as a beginning, not a limit.
Choosing a saint does not lock you into one devotion forever. It simply gives you a place to begin. Read one short biography. Learn what virtue stands out most. Pray one simple petition for a few days. If that saint opens up a richer path of prayer, stay there. If another saint becomes more fitting as you read and reflect, follow that path instead.
Confirmation saints usually grow out of the same process.
If you are preparing for confirmation, the question is usually not "which saint sounds best?" but "which saint's witness can actually help me live the faith?" Some people choose by patronage, some by story, some by feast day or family devotion, and some by a saint whose life keeps coming back in prayer. What matters is choosing honestly and with some real reflection.
If that is the question you are trying to answer, start with the patron saint guide page and then read a few saint biographies before deciding.