Check out these
All of these companies have info & Contractor's Installing guides.
As well as your local Stone or Landscaping/Nursery should have info.
Practice in your own yard if possible & when the time is right to do your 1st job, just take your time. Remember, your 1st few jobs your not going to make a million $$$, but your going to learn the right & wrong ways of doing this work. Best of All!!! It beats Mowing any day.