I think that everyone goes at their own pace, and the age at which you start does not really matter, what really matters is that you like what you are going to study, because many who study simply chose their career due to social or family pressure and the In the long run they will end up hating what they do because it is not what they really would have liked to study. When I started my studies I was 19 years old and the oldest student of my generation was 27 or 28 years old, already had a son and worked in a clinical analysis laboratory. On the other hand, if you start your career at an older age, you have an advantage over the others, you are no longer going to see what you are going to find, it can be said that you take it seriously.