How do you know if you have what it takes to do IB?

I’ve been reading a lot of posts lately about people either not having a high enough gpa to get into IB or finally getting in but hating the job because of the people or the hours. So I’m wondering if I have what it takes? Im 21 years old I have a 3.43 gpa for my masters in econometrics and quantitative economics with a financial track. The school I go to is a non target but it’s ranked 70s. I’m hoping the masters will make up for the gpa not being a 3.5 and the fact that I go to a non target school. I also don’t have a problem with working 60+ hours a week. I’ve been working 40 hours a week since I was 16 and 55 in the summer in the back of a kitchen washing dishes so even if IB is more I don’t think it will be an issue but I could be wrong. I know this question probably gets asked a lot on here but I only have one more year left in my masters and need to start thinking of a career path soon.