Curious as I’m from the UK currently waiting for my A-level results, but am aware you guys already know what the future holds in September and have since start of summer.
Here (this is for A-levels which dictate university stuff what comes before is different) at 16 you pick a few subjects. Learn everything for a year then sit a couple exams for each. Repeat again for the next year. Then in late August get the results. If the results are equal to or higher than the “offer” the university gave you well done. If not, you cry and quickly change life plans.