Open Marriage?

So. My husband and I are in a newly open marriage since I came out as bisexual and wanting to experiment. I figured it wasn’t fair for me to get to sleep with other people and him remain monogamous, so we agreed to be open.

But the thing is, I am a mom and he never babysits so I have never had a chance to go have fun but he is gone all the time having fun so I feel like that’s unfair.

When I bring it up he says its my problem to figure out. He’s also constantly on FaceTime with her, more than he is with our daughter and me.

Have I made a huge mistake in allowing all this?

EDIT: We agreed that if we saw other people it would be maybe once a week or so and to keep it casual, and he’s already violated that. We opened our marriage THREE DAYS AGO