…Seems to be that you don’t really know what you should be doing. Your hormones (nature) tell you that you want to be a fairy princess but environment tells you that you should be Buzz Lightyear, hence we have Princess Lightyear.
There is another more fundamental issue that needs to be resolved and that is the matter of wee. From peer group example, you know that to wee effectively you must stand up on a step by the toilet. At 18 months you are now telling mummy that you need to wee and poo, however you insist on wee-ing standing up by the toilet. Mummy does not know what to do.