How would I connect digital technology to this old Zenith TV?

[Sidonshark]

Grandma has an old Zenith model H1955W TV from the year 1989, and I would like to make use of it somehow. I want to try to connect a mobile (Apple) phone to it, and I've seen people connect phones to old TVs using HDMI to AV adapters. This TV doesn't have any AV ports, and I'm not experienced in vintage televisions whatsoever, so I don't really know how to work with this specific TV. I have attached an image of the different of ports this TV uses.