I Hate being an Adult

It sucks. It's my sister's bill, why can't she solve the problem herself?? I have no idea what I'm doing, it's not like I learnt it in school. They really should have taught us stuff like that as a compulsory subject. People like me have no clue as to what's the first step into paying a bill or buying a house or figuring stuff out about uni. They should give us a manual guide to show us how to live life.