Welcome beginning submissive and enjoy. You are already ahead of the game by coming to the realization you have even before you originated this thread.
Of course BDSM is what you want it to be and that is for you and your partner to decide. It also can and often does involve much love, trust, and mutual respect within the relationship to truly make it work. A BDSM relationship can, and I believe should, have all the elements of a good marriage even if the couple in the BDSM relationship are not married to each other. You are again a step up because you already have that love, trust, and mutual respect for each other.
I personally would get nothing out of my relationship if my Aussiegirl wasn't truly happy. As her Master that is my goal to always make and keep her smiling and very happy. The biggest thing, in my opinion, that you can offer your partner is communication. You each must know what the other wants, needs, and expects out of a BDSM relationship. It will work if you keep the lines of communication open. It more than likely will be but does not always have to be sexual to get great satisfaction for both partners.
You will have a great time as you explore and learn together.
Hope this wasn't more than you wanted to hear right now but when I read your thread I couldn't help but remember that less than a year ago I too thought as you did before reading a little about this wonderful and fulfilling life style. I know now it is what you make it.