Investing and Finance at 18

I started investing in a Roth IRA through Fidelity when I turned 18 in April and I’ve made a return of 13.61%. My investment mix is most aggressive and I’ve been seeing the returns. I go to school and work part time to make money. I was wondering if there is any advice that someone would have for me if they were in my situation or if there are any investing/personal finance mistakes that I could avoid for my future. I’ve done lots of research but I know that I have plenty more to learn.