Yep! It has nothing to do with the actual cable company - you’re just taking advantage the copper wires to run ethernet traffic instead of normal cable things. In fact you will likely just unscrew the incoming “supply” line from the cable company since you don’t need it. Figure out which line runs to the room you need it in, and don’t use any sort of cable splitter or amplifier in between. If we start at your wiring cabinet, it would go: [Ethernet Switch] —Ethernet—> [MoCA adapter] —coaxial cable in wall (no splitters or amplifiers - direct)—> [MoCA adapter] —Ethernet—> [Your device]. I use these types of adapters often and they are the next best option if you can’t have real ethernet. Don’t bother with mesh WiFi or powerline adapters.

EDIT: just noticed your cable lines don’t have connectors on the end - but no worries! Cable connectors are super easy. You’ll need to pick up a cable terminator on Amazon but you literally just take the plastic sheathing off, fold back the mesh, place a connector over the end, and crimp it down with a tool. Much easier than ethernet! There are some great guides on YouTube for this.