There have been lots of discussions on engraving in the past. If you click on the search icon up above, type "engraving" into the search for box, click on "search in topic subjects only", unclick the check all box, click on the "choose a board to search in", click gun building - then hit search. Load of information will pop up for you.
If you can work with wood and have some finesse with your hands, you can learn to engrave. The Lindsay sharpening templates were a huge help to me. I use the 96 degree and the 121 degree mostly.