I think my dad is getting depressed and lonely but I don't know how to help him. How can I connect with a counselor to get them some mental health support?

Hi all, I'm really worried about my dad. Since Mom passed away last year, he's just not been himself. He barely leaves the house and doesn't seem interested in anything anymore. I think he might be depressed, but I have no idea how to help him. I've tried suggesting he talk to someone, but he's from that generation that doesn't believe in therapy.