Tips for starting lawn care business?

i am 15 years old and want to start my own lawn care business. i have about 3 years of experience doing yard work so i know how to do all the manual work but i just want some tips on how i should run it should i heir some help etc.this year i just have a self propelled mower ,weed eater, blower but i am hoping to save up and get a riding lawn mower and trailer next year so i can do more lawns