well basic scratch maps on horn is easy and sure does alot to personalize your item. It does! Yet Schrimshaw covers alot more than that.
Horn carving, and ink staining of horn is as easy as whistles and watercolors,,,horn is an easy medium,,practice on your old one,,who know's? maybe you'll be another picasso"
My point is "go for it!". There's a ton of info on-line for free.