Coax to ethernet for new router

I see multiple Moca adapters for converting existing room coax cable with an adapter at each end but all I need to to connect my main net coax to my new wireless router 

My internet service comes in via coax and I want to connect to a new router that only has ethernet cable connections

What is the router's model number? Coax cable needs to connect to a modem or a combination modem/router gateway device. If your router is the stand alone type with only Ethernet connectors, you need to add a modem between the coax line and the router.

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That was my thinking but Best Buy Geek said the new routers are also modems 

I bought to replace an older Netgear AC1900 which has a coax input  and serves as both modem & router 

TP-Link - Archer AX3000 Pro Dual-Band Wi-Fi 6 Route

https://www.tp-link.com/us/home-networking/wifi-router/archer-ax3000-pro/#specifications says:

System Requirements: Cable or DSL Modem (if needed)

You need a cable modem to use a stand alone router like this one.