as long as you are in yeshiva for the right reasons then you should be able to know yourself and know when you are ready to leave and i dont mean that in a bad way being in yeshiva cause you want to even if ur not learning the whole day is still a good reason as much as all the balei habatim would like to argue but ultimitly it comes down to honesty and asking a rebbe
hope i didnt sound to cynical in this post 🙂