TL;DR I’m new to this and would like a little guidance or tips.

So I(NB20) have come to the realization that I’m more than comfortable with my gf(20) having other partners. She’s expressed that she’s very interested in this and told me straight up at the beginning that she wasn’t sure because she didn’t want to hold me back cause she feels it would hurt her to see me in the same position. I understand where she comes from and I can respect it while still happily seeing her have those outside connections. Basically, I’m new to all of this and don’t really know how to go about the lifestyle I guess? Like should we try to actively seek someone out or should it be a natural progression of her just meeting someone somehow and becoming interested.