How to use a vps server as a wan port of a local network?

Hello, I explain better my concern. I have a local network with applications installed on several servers, my ISP cannot provide me with a static IP address, but I need to access my network when I am not at home, I would like to know how to join my web server locally for example from the IP address of my online VPS? I tried with openvpn and port forwading, but not being an expert I’ve been going around in circles for days and I’m treading water. the vps runs on ubuntu as well as the web server.