But you should be able to keep your existing Comcast hard-wired internet and just drop the cable TV part. I assume that's what others who posted here have done and not switched to wireless/5g.
I pay $80/mo for 500mbit/sec Verizon FIOS, would think you can get something similar from Comcast, based on what people posted above. When I include $50 for Sling it's $130/month for TV and internet. That also includes a hard-wired telephone, but I have never plugged one in.