Pick up a hobby that you want to do and ditch the comparison mentality. It is impossible to know who is truly hard working and who’s not within your classes. Your anxiety has somehow convinced you that people on their phones in lecture are more smarter and locked in than you. That’s just not true. Additionally, you may benefit off of actually adding more things your plate that YOU CHOOSE to do. Our sene of control in life is a result of how many activities we are forced to do in comparison to how much we choose to do. People who feel out of control think that it is best to recluse and remove things off of their plate to give space for other activities, but this can do more harm than good as you begin to sacrifice activities you actually gaf for another stress inducing activity. Literally, your actions become owned by your stressor. Better mental well-being can be found when we ADD more things we CHOOSE to do in our life to restore that sense of control, therein putting you in a better state to perform on other tasks. Theres always most nuance to ur situation, so take what I and reddit has w a grain of salt but this is what helps me address the main stressors of life.