I'm a 24 man boy.

I have always lived a life void of discipline, physical exercise, proper nutrition and proper sleep. I avoid others, I'm not sociable. I became dumb because of all the stupid youtube videos I watched and because of the complete lack of intellectual stimulation.

I go to bed when I can't stay awake anymore. I eat crappy food when I am "hungry". I never exercise. Body hygiene is a rare luxury... no friends, heavy porn and video games consumption, no hobby...

I recently got my first job.

Turns out I need to grow a thicker skin. How do I get tougher?