How do I stop caring about how others perceive me and what they think of me? I just really want to be free of this overly self-conscious mindset, or at least reduce it. 

It’s honestly so draining that I feel like I spend more time thinking about what will happen tomorrow or next week and how scary something will be, and how I perform or present myself in these situations (like a social interaction, a job interview, a class presentation etc.) than actually getting any work done during my day :(( I just want to be a confident, unbothered and socially-anxious-free person :(( oh wouldn’t that be nice