Hello Jenifer, you are correct that writing an essay in your school life is too easy but at university-level it becomes hectic but if you learn English from a well-known online institute, the thing is how do we know that the institute where we want to enroll is legit so, when I was in that situation I checked Courselux certification before enrolling in that institute which ensure me that you online institute is legit and certified from an well-reputed organization so, you should also try this practice before enrolling.