hi welcome to lawnsite! you have come to the best place to learn. let me answer ur question with a few questions, do you have any experience in the field? before starting it helps to work for someone else to learn, or maybe u already know alot about the field? do you have any equip yet?
and most of all, have you tried to do a lawnsite search? click on the button "search" on the top of the page or in other places also and type in whatever question you have, even "getting started" will give you tons of answers, this question has been asked many of times and you will get great info through the search.
STS Lawn Care