Is it my choice or their choice?

I went for a interview for a catering/events executive position last fri.. It went quite well.. the interviewer is really good in pointing out my mistakes and have said that he will be able to train me and change me to be a better speaker.. yup.. my minus point is not able to speak professional and commercially.. I couldn't speak well and properly.. every time I will "grind" my words.. and I "speak like a old woman" why? Is it becos I process my thoughts in Chinese? Did I? maybe.. becos I can speak chinese more comfortably.. I really need to improve on my speech lah.. I must make a point to speak in more correct english..

That's the only bad thing that interviewer feels I should improve on.. I am actually quite happy that he can help me.. and thinking of giving this job a try.. I know how tough this job will be to start from scratch.. how irregular the working hours will be.. how low the pay will be for a beginner like me.. I actually don't mind about this.. I want to learn! I want to learn about hospitality.. I am considering working in the IR in the near future... okay.. it is not related to my science degree at all.. and I am not considering working for chem related companies.. I don't want chem already.. I have enough of Chem.. so can my mum pls stop telling me to find chem related stuff? really sick of it..

I thought the interview was going very well and I most probably will get selected.. quite confident of it and it really did.. but I never accept the job offer in the end.. becos it will give my dad a heart attack.. he is so worried that I take up this low pay job.. "you study so much.. you should get a job that has a pay equivalent to your level! Not something a low education level person can do de.. " and "it is a very shitty job.. I always hear my customers complain to me that they have to work until very late.." and " you are not suitable for this job at all!! you can't do sales.. it is too tough of you.." and " I am happy that you look for those management kind of job but this job really not for you.."

Okay.. after telling him about my choice of job.. he really can't sleep that night.. why must he over reacted on this issue... why must he be so worried and why must he get so agitated.. I really feel sad.. not that I disappoint them but becos I can't choose something I like.. I have no freedom at all.. there are times that I feel that he is just worried that I earn less and so cannot bring more money to home and he cannot work less.. I really not stand him saying that he will work less after I start working.. I just feel the stress to work just to take care of them.. is that my life in the future.. I have to always meet their expectation and I can't pursue what I want.. Can I grow up?

I really don't know what will happen next...