Need help connecting A14 to projector

[DJHA]

I have an A14 phone and I need to be able to connect it to a projector in a classroom.

I have been teaching tech classes for senior citizens at University of South Carolina Aiken for 18 years, and I agreed to teach senior citizens how to use the Android phones, and this has me stumped.

I understand that some Samsung phones can "cast" to a TV, but my model doesn't have that capability? I checked and it appears my phone does not have MHL (Mobile High-Definition Link) support.

I did a Samsung support chat with someone named “Khan”, and he typed:

“Plug one end of the cable into your phone's USB-C port and the other end into the projector's HDMI port. Make sure both devices are powered on and within range. Once connected, your phone's screen should be mirrored on the projector. You might need to adjust the projector's input source to HDMI”

I ordered the cable and tried it – no luck.

I have seen many YouTube videos -- but need something reliable and cheap!

Can someone please help me?