You don't necessarily be good at maths to do economics. All you need is actually just some common sense and logical thinking. From maths i think understanding the concept of proportionality is enough because in questions the sometimes compare the relationship between the prices and quantities using proportionality.
I personally think economy is super hard because you cannot predict the questions from doing past year papers unlike sciences subjects, you will also need to write essays and the ability to analyse the articles given. Economics also requires you to memorise all the definitions correctly and not like how you understand it because you get marks from writing the definitions accurately in the essay exams.
I am taking economics as level this october and my essays are not improving as much as I hoped because i sometimes don't remember my definitions. That are just according to my opinions and experiences. I hope it helps you!