Are you asking him to date? If he is asking you, then I would not say it is too early. If you want to ask him, I say fine. In either case, the mourning process is unpredictable. The things you mention aren’t necessarily warning signs, but they could be. Really, all you can do is try, be sensitive, and see what happens. If you don’t express your interest, he may end up with someone else who does.
A good friend of mine, a woman, has been going on jdate and the other sites now for a few months. Her husband passed away a couple of years ago. She clearly wants company, and to have fun. But just as clearly, she is nowhere ready for another relationship. She may never be.
I don’t think men are all that different from women in terms of mourning and dating. Also, at this age, they don’t necessarily have the same goals in mind. They’ve had kids. They have houses. They’ve had careers. They don’t need to do it again.
I suspect that dating can be more like friendship at this age. Whatever age this is, lol. I’m not saying. People don’t play games as much, unless, I suppose, they have traditional ideas about sex. But sex just isn’t that big a deal when you don’t plan on or can’t have children. It’s about comfort more than ownership.