Do I still have it?

My wife of 30 years has given me the green light to explore a side relationship, as our intimacy has dwindled. She’s open to me having a little fun on the side, but only every couple of weeks, and she wants to choose the person without meeting her or having her come to our home. She even asked what kind of woman I’m interested in (age, etc.). As a 58-year-old straight man, I’m feeling overwhelmed and a bit anxious about this new territory. It’s definitely a big change for me!