Beat way to Express

My little girl is 4 weeks old, I am wanting to start expressing milk so my husband can help and bond/feed. She only feeds 10mins at a time on one side and then is happy for approx 2 hours until her next feed which I will then use the other side.

Please help mamas..

What would be the best way to express? Should I pump on the other side while she is feeding? Or just pump separately once she has finished feeding?

I don’t want to over produce and end up with engorged sore boobs