Wow, Daniel - what an opportunity! Although you have only started learning Ipponmae, it is by far the most important waza you will learn, & is the basis for almost everything else in iaido. I'm still learning all of its secrets after more than 25 years of training. What to watch? My suggestion is to pick one of the senior iaidoka & watch him/her to see as much of the performance as possible. You should easily be able to pick up on how his attention becomes focused before each waza, how all movements are synchronized & smoothly performed, how the blade is drawn, the trajectory of the sword in nukitsuke/furikaburi/kirioroshi, & how noto is performed. Then try to visualize yourself doing the same things.
Go & enjoy!
Ken
Ken Goldstein
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Judo Kodansha/MJER Iaido Kodansha/Jodo Oku-iri
Fencing Master/NRA Instructor
"A positive attitude may not solve all your problems, but it'll annoy enough people to be worth the effort."