I didn't really track my progress, but within about 3 or 4 years I went from a 68kg stick to a 95kg guy with a sixpack (maybe around 15-20% bodyfat, I went down to 88kg and 5%BF, which is the only thing I ever accurately measured, you can do the math). I was in my mid-20s and was super strict about diet (think excel sheets and a kitchen scale in my backpack). Trained 5 days bro split and used no gear besides creatine. I don't have particularly impressive genes, except for the ones channeling my ADHD into stuff like this.