Help advice please for btec applied science level 3 !!!

Hi, please read I really need some HONEST advice from anyone!!! For context, I have applied for the first year of college again for BTEC L3 Applied science extended diploma. I am technically meant to be in year 13 but lost a year doing something else. I need help deciding if this course is right for me as my parents do not want me falling behind another year. If anyone got similar GCSE results as me and took this course and did well and received merits/distinctions please let me know!

For my GCSE, I did foundation combined science and received a 54. Though I am able to get into the course with this science grade, science is not my best subject clearly. I've always found biology easier than chem and physics but I do struggle quite a bit. I would love to take this course and go to University to study Biomedical Science, however I am not sure if I would be able to get a Merit or even distinction. Does anyone know of anyone who got lower grades in science GCSE but did great and got Merits in their BTEC?

I've heard from some people that as long as you keep up with the assignments, you will be fine but I am not too worried about the workload, its more the content. Is the content and exams hard for someone like me who did foundation combined science.

Please give me any advice, I'm starting to doubt if this course is right for me and i'm facing quite a bit of pressure and feel like i'm going to fall behind even more if I don't pick the right course/ waste another year. Please be HONEST as if you think I wont do well due to my GCSE grades, let me know, i wont be disappointed. For reference I got a 5 in maths and english if that helps in any way.

Thank you so much for any help and sorry if i'm being dramatic.

If you didn't take the Applied Science BTEC, then what BTEC would you take instead? Is there a GCSE subject that you did particularly well in for which there might be a BTEC Level 3;equivalent?
BTECs are quite different from most GCSEs in that there is a lot of emphasis on coursework rather than exams (although there are still exams). For students who struggle with the sheer amount you need to remember for exams, or who struggle with the stress of exams, then they can be a very good option.
Although I've seen some research papers which attempt to correlate GCSE and A level grades ("If you got grade X at GCSE you're most likely to get grade Y at A level"), I've not seen anything similar that relates GCSE grades to BTEC Level 3 grades. This may be because the way they're assessed is so different.
I don't see any reason why someone achieving 54 in foundation-level Science shouldn't be able to do well in a BTEC Level 3 Extended Diploma in Applied Science. Unfortunately, I can provide no evidence either way (and science is all about evidence, after all).
Just out of interest, when you "lost a year doing something else", was that "something else" a qualification (which one?), or was it more of a simple gap year? (If it was a qualification, and it didn't go to plan, that might provide useful additional information.)

Firstly thank you so much for replying and your help!

If I didn't choose applied science, I would choose health and social care, however the career options are quite limited with that course.

Also, In that year, I did an L3 apprenticeship in childcare, I didn't end up completing it as I didn't enjoy it sadly