Joining Teutonic Knights?

First off Im aware this post may be bold or taboo especially for my first post but I have a great amount of interest in doing this and I was hoping someone on this forum could possibly help me or push me in the right direction. Ive done extensive research on the topic and information is still very scarce from what I gathered you must be of german decent and be a catholic priest also speak german and travel to there hq in vienna does anyone know more about this from a first hand source possibly or even know somone i could talk to about this? Thanks for your time