How should I lose belly fat?

I think I might be overweight. I’m 14 and I’m about 5’8 and I weigh around 160 lbs and I have belly fat. Lately, I’ve been doing a lot of crunches and push-ups and I’ve been cutting out unhealthy foods. I’ve heard cardio is also necessary to help lose weight, but I get shortness of breath easily from running, so should I go biking instead? Please give me recommendations on how to lose weight and excess fat.