i had no friends throughout my time there, a miserable retail job, and i pretty much locked myself in my room. graduating was a weird feeling since i had been in school my entire life and had no clue what to do next; i quit my shitty job, ended up being a neet for a year since no one wanted to hire me, and i wasted away my entire savings.
my life still sucks but i have a full time job now, i can do what i want, and live on my own - my closest friends are the anons here which is pathetic but its the best i guess i can do (the depression never left but at least i can distract myself until i'm older). if you can't get a job in your area of study, try going for basic office jobs - they're awful but they seem to pay alright for easyish work. you can keep changing throughout your life but if you kill yourself you never know if things eventually turn around