I've been in the exact same situation as you (was in it last year). Same age, also in University. In a few words my piece of advice would be: GO FOR IT.
You will meet A LOT of negative people in aviation (and that goes for any industry, but especially this one) who have had bad experiences or have known people with a bad experience. The thing is, on this forum, you will mostly hear about people with bad experiences as most of them with a good experience are out there making the best of it instead of sitting on their ass complaining on this forum.
You only live one life and you should do what you love. If you want to sit in an office all day 9-5 with your accounting and finance degree then that's honestly great. But if you can't picture yourself doing it then you will most likely spend those days thinking 'what if..' with that 737 aircraft model sitting by your computer monitor.
By the way, the British Airways FPP is closing on Monday, just a heads up if you missed it.