He called me earlier but I was busy at work so called him back during my lunch break and we spoke for about 30 minutes...
It seems he still does not know that I know he is my father, but he was very interested in knowing the details of my kids and also my life in general (where I live, what I do etc).
He agreed that we should get together some time soon as I mentioned that there is still something we need to talk about, but I would rather do so in person.
So I also learned I have 2 siblings, male (aged 29) and female (aged 28)... and from the two of them he has a total of 6 grand kids.
It is unfortunate that those 2 siblings are drug addicts 😖 (as he said).
But in general we had a good conversation. I learned he is now 54 years old, he prefers relaxing at home than to hang out with many people (same as myself). Also learned he is a spray painter... and he offered to help me when I said I planned on respraying my car soon (which I plan to do myself).
I told him I would bring my kids along too so he could meet them and he said its a good idea. So all we need to do is set a date.