Create new object importing CSV

Not finding any tips on creating fields on headers specifically for creating new objects/fields by importing a CSV. For example

Cane Number - Date - Name - Reps

I figured if you fill the fields after the header you get your field type selected and filled, like Date, it knows its date (or have to enter a date below the header); also, a field (header) "Reps" can have all the names below in a colum or all in a field separated by ";" - etc - any tips? thanks