Hi Jaycake24,
My advice, as a HR professional in a marketing agency, is to do a little more research into what part of marketing/advertising you are interested in.
Marketing has become very focused on analysis over the past few years as digital marketing/advertising is much more measurable. It's a rare marketer who doesn't know their way around a spreadsheet.
The profile of someone who is successful in marketing is often a BSc/STEM degree, followed by a more specific marketing masters degree.
I would always recommend someone to study Mathematics, or a traditional subject such as Biology, Chemistry, Physics, English, History, Geography. Economics is also very relevant to marketing, as marketing is really about getting people to spend their hard earned money!
I agree that a Russell group University will help you secure interviews for top tier brands and agencies.
If it's the creative side of marketing, such as Copywriting, I would advise an English or History degree rather than Marketing or Advertising.
You will find that studying a traditional subject at a Russell Group University will set you up for life, and also leave your options open for when you graduate. It won't be a surprise to you to learn that many people change their mind from 17 to 21, as a lot happens at University to change the way you think!
Starting salaries in marketing/advertising are generally between £14-18k, so certainly low compared to other careers. It's not a career for those people who are motivated by money.
I hope this helps
Phil Blaydes
Recruitment Manager
Forward3D