economics alevel

Hi there
I’m starting economics alongside sociology and business this year for alevels. but i’m really worried about taking economics because i only got a grade 6 in maths and and in business. i find the bridging summer work a bit confusing but i’m scared i’m going to be the dumbest in the class and find it really hard.
has anyone got any tips?

i got a 6 in maths and 70% overall in my economics a level. there’s really not that much maths. i did business for a level and there is a lot of overlap but it’s more year 2 a level so i wouldn’t worry. what’s on the bridging work?