Hello student to be true its tough to follow someone else time table inspite of your owns. If you're going to school also then it's really a hectic schedule for you but you've to deal with it. I'll suggest you to just go with the things they taught on class never delay anything on tomorrow because that tomorrow never come. Also review the chapter/topic hour before your class that'll boost your confidence and also increase your interest in the whole class hour. Ask your doubts with any shame more you ask more you're doubts will be clear. Never hesitate to ask doubts to your teachers as well as your fellow classmates. Try to ignore wasting time on social network such as Facebook/Instagram/what's app because your time is very crucial and you need to consume it in study.

Feel free to comment if you have any doubt
Good luck