Hi Rachel. It might not directly help you but this was my experience. I'm half way through my degree at the moment and almost left to go into flying but decided to get my degree then do it. At the end of the day I would still have my degree if I didn't enjoy the job although I hope I will one day. When I told my family I was going to apply to be cabin crew after uni I got mixed reactions. My dad wasn't impressed and my mum thought it was great that I would travel and see places.
The bottom line though at the end of the day is that you will still have that degree, done the job and if you enjoy it, great. If not, you tried it and won't ever look back and think, if only! While its not easy doing something that you think your parents won't agree with its your decision and life here and I'm sure they will still be there for you.