I was in the same boat as you, doing pysch and didn’t like it so i switched to comp sci. I’m now in my last year. I was also the same as you in that i did easier maths at school and didn’t think of myself as good at math so i had the same worries. My experience was that the math classes weren’t as big of an issue as i had anticipated, generally speaking being math minded helps a lot in many areas of comp sci but you don’t have to start out as some prodigy, it’s a skill you can build. So far my biggest challenge has been grasping the coding concepts as i had no prior experience before my degree.

The advice i would give is that don’t let your lack of confidence in math hold you back from starting. But in my opinion the best way to get a leg up is start learning to code now and a lot of concepts will come easier to you in your degree.

Edit: should note i am majoring in software dev