People here talking about "props", and that's fair and dandy but only and only if you truly like or are into said props. Because you will attract people who are into that too, but also repel those who aren't. As a woman I never cared much about either people with dogs or babies. None of my business. But I have approached people with other animals or doing arts for example.
My recommendation would be to join a group activity and stick to it for a couple months. See how it goes, then switch to something else. It can be life drawing, bushwalking, patisserie, guitar, board games- you name it. This puts you back in control because the activity acts as the prop, and by context you are allowed to say "oh such nice drawings, how do you do xyz?" " Are those shoes good for walking?" "Do you bake often?" You start the conversation and it doesn't need to be personal at all. I'm always surprised to see normal people cross the line and start asking personal questions about me once I make it obvious that I'm open to conversation.
I relate to the car guy, but I was born a couple years out of the box