[@Lady Amalthea]
Hmmm, I was pretty railroaded with my character starting from being a lowly prostitute to becoming a well-earning one. However, I did have aspects of them being a courtesan as they essentially 'evolved' with their clientele, as not everything had to be lewd activities at their current station now (things like providing companionship and similar things that are being paid for instead of sex alone). So, for all purposes I would indeed call my character a 'courtesan' as they had refined themselves to catch better fish outside of the 'normal' requests.

With the wealth they earned from their better clients, my character would develop themselves by taking private lessons (as they were too poor for education initially), learning etiquette for the upper classes (to interact with peers and gentry class people), and things like that. Both to improve themselves as an accomplishment and for the added benefits of being more sophisticated