Since you're already an accomplished shooter, and already familar with muzzleloading in general, it'll be a short learning curve...the main two differences would be the cleaning & lubing and the "flint lock"mechanism & ignition.
I've hunted for almost 50 years up and down the east coast and have never taken any game that was more satisfying than a buck taken with a Flintlock and patched round ball...even more satisfying than the years I bow hunted because I was using a modern compound bow so I knew I was cheating a little on the traditional aspect of bow hunting...but Flintlocks and PRBs are what the settler's used...I've hunted exclusivly with them the past 5 years and my only regret is that I didn't start 25-30 years ago.
