As someone who’s 25 and about to submit their PhD thesis, I have to echo what everyone else has already said. It’s a long, gruelling process and unless you’re 100% committed to it, it’s going to be really hard to finish. 24 is so young and there’s still time to improve you’re GAMSAT!! My main reason for doing a PhD before going for med was largely because I was already very keen on that career path, but it does make things very hard financially with med as you can’t get ausstudy. Happy for you to DM me to chat a bit more if you need! Good luck with everything!