Life at a standstill in Life

I don’t think I can have a successful career at anything. I have a mental state which tells me to walk away from anything which disturbs my peace of mind or my mental well-being, I had just graduated from college and I’m working at marketing in a company for a petty salary. I hate this job. I suck at convincing people that they need to buy products when they actually don’t. All my colleagues are around 30 years of age whereas I’m just 20. Hence no friends at work place. My friends from college and school seems to have forgotten about my existence. The only few handful of people who care a little about me are busy with their own careers. I don’t want to disturb them. They’re a long way far from me now anyway. My family doesn’t seem to care about what I want. They are concerned about my well being but they’re not understanding that this is not what I want to be doing in life. I can find nobody who could relate to my interests. It’s been 8 years I got my first phone. Not once I’ve received a phone call from someone to check on me or just … like..... “Hey… wanna hang out ?”. I thought they only do that in movies for sometime. Seeing Instagram stories of people hanging out with each other and people standing up for other people hurts. Everyone is cool with me when I’m around. They seem to like me. They’re nice to me. But I never understand why I’m not invited anywhere. I like my own company. But it’s during hard times that when you really need someone beside you and turn around to see no one, it stings. I scroll through various apps to text or call someone over to share and vent out. Fails to find someone who cares every time. I know when people ignore or avoid me. Like I don’t even make them explain a made-up reason . I just tell them that I understand. I just wish I knew how to fit in. So with no friends, no social life and no actual career, I wish I knew how to make things better.