Maybepossibly, 30

Curious and confused I am a curious young woman wanting to know more about what it means to be submissive. I think there is a possibility that this would suit me, but can't seem to find enough information to really know.
I am currently in a committed 'vanilla' ( I believe the term is?) relationship and am happy in many ways, but I still feel like something is lacking. There are also certain issues within my relationship which could be explained by my potential submissiveness (is that a word?)
Basically what I'm looking for is knowledge and some potential guidance/friendship as I continue on a path of self discovery.