No, you can't start until you have finished two books on IDES ig mathematics, because IDES ig mathematics belongs to the category of higher mathematics, which involves calculus, geometry and Olympiad knowledge, but the content is comprehensive and there are many difficulties, so you can learn the key points, difficulties and knowledge points that match the subject, and then consolidate the knowledge points after learning, so that you can continue to study other courses without affecting the normal curriculum arrangement, and you can also master the knowledge points of many subjects.