ORIGINAL: F-15J_JSDF
I have down loaded Manuals from the shops selling the aircraft like the Zero and the Skymasters Jets, read them, re read them, and they have still done my head it.
That would happen to anyone that doesn't have any building experience. The more advanced the model, the more the writer of the instructions assumes that you know. Building models is much like flying them. In order to be successful, you have to start with the simple things and learn the fundamental skills involved before progressing to more advanced activities.
Don't get intimidated by your goals, but at the same time don't expect to be able to just jump right into the deep end of the pool. Take the time to progress in a way that allows you to be successful.