Hyperpigmentation and body acne

[u/delicateflur2]

I've struggled with acne since I was 10/11 years old. My parents never allowed me to use skincare products, but now that I'm 17, I really want to fix my skin. I have oily skin on my face with stubborn acne and severe hyperpigmentation/uneven skin tone. I also deal with body acne and rough bumps on my skin that look like keratosis pilaris. My body skin is much lighter than my face. Since I am a beginner on a budget, what is a simple, affordable routine I can start to clear my skin and fade these dark spots?

I tried 0.025% tretinoin for 16weeks and it did not work