Ken C Hunt has a drawing series on youtube that will help at least give you an idea where to start. Just search his name everything from basic backbones to more elaborate details presented in a way that is helpful for the artistically challenged like me.
Allen, if they are engraved I use screws so I can remove them after the filing and sanding engrave and replace. Smaller inlays are nailed with nails made of the inlay material. I don't use epoxy or any other glue.
I do inlays on long rifles the most important part is file a slight draft or angle on the edge of the inlay, the bottom of the inlay should be slightly smaller than the top so as you work it into the wood it gets tighter. Take your time.
thanks monk, I will put in some foreground to a vanishing point. I'm practicing cutting big bluestem. not ready to cut it on the gun yet, just a little bit along the bottom tried to make left bird look like it's just coming out of the grass.