창업하다 to have a start-up and having your own business 차리다 is used for opening a store or start a business like 가게를 차리다 열다 is to open. can be used for opening windows and doors but also for opening your store because it is the business hour like in the morning 커피숍이 아침에 열다 세우다 can mean build a building or do some great work at work 시작하다 means to start anything 게임을 시작하다 / 공부를 시작하다

Thanks 😊