Maths A level

I got a B in my GCSE's for maths and despite having below the minimum required amout of C's and above, I've been allowed to take A level and further maths. Difficulty is clearly an issue as well as little to no time to make a plan B but I've been given a chance that not many people get at the grades I currently have and it's been a goal to eventually become a maths teacher. What does everyone think? Level 2 work skills course or A level ans further maths?