AC1600 WiFi cable modem router

I’m not sure I’m in the right forum but here’s my situation. I live in a metal siding house and have a metal shed about 20ft away. I have AC1600 WiFi cable modem router and 100 Mbps service. I have no signal outside my house or in my shed. I want to run cable from house to shed and put in access point to have WiFi inside shed. I don’t want to spend a lot of $ but want something that will utilize the speed I’m paying for or at least close to it. My question is what product do you recommend to solve my problem?