How do I build a relationship with my bio dad?

I'm 27 years old and just found out I have a different dad than the one who raised me. My mom and I got 23 and Me's a few years back and last year for Christmas my siblings and I decided to get my dad one. He finally sent it in this summer and when he got his results back I was shocked to see he did not show up as my father. My parents were married and I was the middle child, I had no reason to ever believe I had another dad. My dad who raised me told me he suspected my mom of having an affair at the time but never had proof so he kept to himself. My dad gave me the name of the person he suspected and after a little investigating I found him and got it confirmed that he is my biological father.

I just met him for the first time and he was very sweet and a little nervous. He said he had absolutely no idea my mom was ever pregnant with me and he wished he had known because he only had one son and always wanted a daughter. He said he wants to make up for lost time as much as possible and I agreed. The problem is he is 60 years old and I am 27. How do you build a relationship at our ages? I do not have any living kids so we can't bond over that. I am really struggling with ideas on where to go from here and would appreciate any advice! Thank you!