Tddeangelo, the only real difference between German Jaegers and American Longrifles in building is the intricacy of inletting the fancy butt plates side plates, T. Guards and so on. Also the carving of the German rifles is usually more intricate than it is on American rifles, but not always. Some American Long Rifles had carving that was the full equal to the masters of Europe.
About the only thing on a Jaeger that is actually easier to do is the barrel inletting. Shorter is stiffer, so the 28-31 inch German barrels go into the wood faster and easier with less chance of flexing then the typical 42 to 46 inch American barrels.
Carving, engraving and wire work are all subjects for discussion, but they are not "building" topics. More under the topic of ornamentation. But if you want to chat about them drop me a note and we'll exchange phone numbers. I can advise, and give you a few tips that will help.
Learning this kind of thing is fun, but I recommend learning on objects that are not too costly. In that way you can carve and sand off the carving many times to learn the tricks, and never cost yourself more money. Same with engraving. Use round stock from steel yards to learn on as well as some 1/16" thick brass plates. Think of them as the tablets you got in 4th grade. You would do the work, then throw that paper away to do the next assignment.
It's not the papers that are important, but the knowledge and skill learned by the student.
When you get good at a given skill, THEN buy a set of gun parts and do the work.
It doesn't take as long as most people think to learn. Working on real guns and gun parts can get very expensive if you make bad mistakes, but steel from the yard costs about 60 cents a pound, and if you buy a HARD stock from any supplier you can carve, sand, wire, sand again, carve again, and on and on, for the price of only one stock.
Don't buy soft wood. Always hard.
You can learn good skills working on one stock for a full year, and when you have cut it down to minimal dimensions you can still sand all the old work off and sell it as a plane gun, getting all you money back and usually a small profit to boot.
But------ back to Jaegers.
Here are a few I have done. I hope they are helpful.