Why can`t I follow my own advice?

I finished high school this year and took a year off to earn money for college and to "upgrade" my poor grades. Approximately three weeks and a half ago got myself a job as a telemarketer. And I bet those who read this post are grimacing and thinking, 'what the hell were you thinking?'. Actually I didn't think, I was lured in by my friend and by the money. Let me tell you, I earn lots by sitting on my lovely bum and talk in the phone and try to sell things to complete strangers. So what is the problem? I don’t know if I can really do it. It is a very difficult line of job, there is not much hockuspockus, but it is so difficult for me to call people and get used to talking to strangers. Normally I would advise others to really think and decide if they are comfortable with the job or even like it. If they don't then it isn't worth it.

But why can't I follow my own advice? I am not comfortable with it and I don't even like it. Then shouldn't the answer be obvious? One side of me is saying that I shouldn't give up so easily because it wouldn't look nice on my CV. But then another says that it isn't worth it. Then another voice creeps in and says that the money is worth it - for my future - and I won’t be able to earn that money any other places with the same work hours. The pros are so much less than the cons, and I don't know what it says about my situation or what it says about me. Right now, I'm very unsure about my next move, but I guess I have to stay put for a little while and then see what happens.