Starting all cardio workout . Good idea?

I dont have any access to a weight set and i dont want to pay for a gym membership. So im going to try an all cardio workout. Is this a good idea? Intense cardio about 5-6 times a week. Im 17 years old , m, about 6'3 and 160-170 pounds. I dont really care about getting big and bulked but more lean, low body fat, ripped. Im thinking about running 2-6 miles every morning , and a few hours later start doing the workout program Insanity, which involves alot of jumping, pushups, etc.... Is this a good idea or am i doing way to much cardio? I am in relatively good shape. Ill also be taking a few supplements like Scorch(fat burner), a nitric oxide supplement, creatine, protein powder, as well as a daily multi vitamin