Suhani, CA is one of the professional courses that does not have specific Colleges for curriculum. But ICAI mandates that students undergo a study period for a specific period for every level. For example, CA Foundation needs a mandate study period of 4 months. Now because CA has its own curriculum and it is difficult to be understood, students prefer coaching and it is highly suggested that you opt for coaching as well because it is difficult to crack CA at each level.