i get a lot of fuckbuddies, but maybe 80 procent of only want to become actors. and the last of  them who want to become hookers is only with a max of 2 stars. why?

Depends on your amount of max (and current) excitement and this is connected to your level in general.

You can see the needed level (or excitement) at the fuck buddies table via bitches and hoes management screen. 

I assume you are too low level.

This mechanism is not working for recruiting actresses with jobs.