i want to learn how to build a retaining wall, some of my friends are telling me i am biting off more than i can chew, i can cut grass very well with some of the straightest lines in town and am learning more and more everyday thanks to you folks, but as far as grass,mulching,and planting i want to expand into landscaping and maybe even irrigation, my question is how do i get started? ive had people ask me to build them walls and i tell them im not experienced enough to do this, althou i believe i can i just dont want to put it on my nickel and if i **** it up im the one paying for it. so how do u guys break into new grounds? trial and error? thanx for this site thou cause its already saved me hundreds of dollars.