3 years of isolation feeling suicidal

Now iam 20.5 years old, After completing my 12 in 2022 with pcb I started procastinating and became so lazy watching reels and just brainrot reels and videos . In these past three years I have mostly stayed in my home not socialise with any friends . I only had few friends but they are also in mbbs , ca intermediate ,and some are in pharmacy 3rd year, I really hate myself for not trying anything in these three years ..i just wasted these years in day dreaming.now Iam extremely depressed, lonely with my thoughts no one (offline ) to talk to ...can't even take any actions laying in my bed all day I want to change myself so what career options I can pursue now. What are some short time courses or diplomas I can pursue to earn good amount of money . I hate myself because I was a topper of 10th class and in intermediate also I was a very good student just due to COVID I got extremely distracted in life