How do go back being extrovert, or at least pretend to be one?

Hi,

So, recently I decided to join a management course for my masters which will require me to be a social butterfly sort or connect with people to develop network and interact and stuff to maybe have a better professional outcome, but the problem is... I was an extrovert who has been turned to complete introversion by COVID and factors within. Like, with continuous betrayal from friends, dishonesty, hate from family and people as a whole (and i have no idea why, just for existing i guess? that i was never good enough or not what they wanted? never the friend they wished for, never the child they hoped for, never the partner they thought of...) garnished by distancing due to not just covid but the same year i got into entrance exam preparation which for some reason made me cut off from the majority of people. And now? I don't like people much. I hate going out. I despise interacting with people. I may at once reply to texts but calls.. oh, h* no! Meetups?.. i'm sorry i have left the planet :)
So, um... basically.. this feeling of not liking people and as a matter of fact even my own self might hinder me in my career later on. I just dont feel like even going towards a human to make eye contact, it feels like work now. So, any suggestions on how i can adjust myself back to interacting with people or as they say, break off this impenetrable shell to i can adjust better and get good results professionally? is adjustment and compromise the answer?