<human>: Can you summarize the given text in a few sentences?

I was working in finance for the past 3 years when I quit to look for a new position (I know, my bad) back in January 2016. My sister and her husband suggested I work at his car dealership. They really hyped up that it would change my life, I would make a ton of money, and my confidence will skyrocket. 

In a spur, I accepted and met with the general manager. I was taken on and begun having doubts right away. I brought it up with my sister who was very upset about it. She said things like, "You haven't even tried yet, how can you be so sure?", "You already made a commitment", "You signed your life away for a year to do this," So I stuck through with it. My first day was to be the following Tuesday.

I'm now in my third day here, and I really hate it. They all poke fun at how soft-spoken I am, how reserved I am, and just thinking at it as a whole, I can't imagine selling anything. Like the other day, a woman was walking around outside. My BIL came up to me and kept prodding at me to tell him what I like about her. "Bonerlicious, she's a sexy piece of meat, etc", they started. I just couldn't do it, it's not who I am.

Anyways, now I'm in my third day of working from 9-9, and every moment is like miserable. I've thought a ton about quitting, but it's scary how they'll react. Surely they'll hate me a ton. I just need some help or guidance with how I should proceed. Should I just stop being so whiny and suck it up?
<bot>: Accepted a job from my BIL as a car salesman, hate it a lot, don't know how to go on now. Please help.