First of all You should make a Proper timeline , that is How much Time Do You spend on Coaching , How much time do You spend in school the next important thing is that this much time You are fixed to give therefore try Not to issues this hour give Proper attention to schools and in the coaching so that You don't need To much of self Study, If You find You are wasting time then First analyse Your whole day write in a piece of paper and the Judge do You really running out of time or You are just wasting it here and there trust me it is more important to manage time the to studies because it will be helpful for Your entire life, therefore, It is only who Yo knows How much time do You spends  at some specific task so You cam only decide how to manage it.