Hi Adrian,

As long as you listen inside yourself, you ought to be on a good track.
Just don’t try to stuff yourself or each other into pigeonholes.

To support what the others have said, it probably helps if each of you thinks about and writes down your present range of interests. Also, sometimes you need to try things out to find out whether you really like them in practice. Trial and error, or trial and improvement! And desires can change over the time. It seems that she wanted to try out a wider range of control and power exchange, and the attempt appears to have presented a stumbling block. Is it something you want to do?

Please remember that not only are you to respect her limits, she is to respect your limits, too. You have no obligation to turn yourself into some pre-fabricated image of a ‘master’. Your interaction is supposed to fulfil your inner desires, hers and yours. Either of you has a wide range of options to choose from, in erotic play and possibly outside the bedroom. This forum and other sources are full of ideas. You can try out what appeals to you both personally, and dismiss what does not appeal. Your BDSM life is what you choose to make it. See what matches and what differs in her and your wishes. See whether enough items that are important to each of you match to form a viable basis.

You and she probably already know this website: Gloria Brame .
Since you are from Austria, you might enjoy this book: Kathrin Passig und Ira Strübel: Die Wahl der Qual.
Also, there is a thread here with some BDSM related links in German language.

Alles Gute. – Best wishes to you both.