Ash444 I know how demotivating that can be, but it’ll be very difficult to tell your chances of getting into med based on your English studies alone, because there could be a lot of other factors that would impact the estimate. This includes: your own estimation of your English skills, your other subjects, special consideration involved and so forth.
I’ve heard of cases where med hopeful students focusing heavily on English and improving dramatically between Year 11 and 12, and ended up getting into med; I think one of them wrote a number of English resources on the original AN forum, so can still be found.
The back ups are purely that - back ups; they’re there just in case you don’t get in. They don’t need too much thought as you’ll have 8 preferences when you choose uni courses.
If you are not sure about undergrad med, you can always do postgrad med and do a different, broader degree that would satisfy postgrad med prereqs in your Bachelors (which is what you’d be doing after high school usually). There are multiple entry points.
In your case, I’d probably work on English most, put some focus on UCAT, but not as much on English (but still give UCAT a good crack) and give it all your best shot. If you do that, your worst case scenario is that you’ve improved in English AND have a better chance to get into med. If you choose not to do UCAT, that’s ok too; you can try after high school or take the postgrad route.
It’s always been my opinion that if you give anything your all, you have a chance, but if you give up, then you have zero chance. (And that goes for anything in general.)