im working on my first build, im doing a mockingbirdish guitar, and i was thinking about my carve and was wondering how to go about carving the horn or arm or whatever you might call it.

my plan is to step the wood with a router then sand it to the final carve, but when the router is far out on the horn it is really shaky and sketch, so im not sure what to do there, is there a better way to do a carve with limited tools? ive checked out the tutorial on here but thats not really the look im going for

heres a pic of what i hope the carve to look like pretty much

ive posted this question elsewhere but to no avail and i need to start planning so i thought its own thread might be best

thank you all