Where do you live ?
Glad to be able to help!
I think you should try to find a Aikikai dojo - and it wouldn't be bad if it was under Nishio Senseis influence. Try the dojo search.
By the way: Where do you live ? Your name gives the impression that you are german but your Profile dosen't really tell. If you live in europe there's pretty good chances of finding this type of dojo - and you can find a lot of great seminars as well. Actually one of Nishio Senseis students will be teaching a seminar in Kiel in Germany late september and theres is another seminar as well in the third week of august.