How to set up „reverse“ VPN server, for accessing home-server

Hey, i‘m trying to host my own server at home with an old computer, for some calculation heavy stuff. However i can‘t get a static IP from my ISP.
So i was wondering if it‘s possible to connect my server as a client to a basic Linode VPN server (with a dedicated ip), and forward all incoming traffic on ports beside the VPN one to my server (exposed host like). So basically use the VPN server as an publicIP front.
Dynamic DNS doesn‘t work since the ISP Assigns one public ip to multiple clients, by doing some sort of port-redirection. So only connections that are initiated outgoing are going to be established.
So if it‘s possible, how do i have to configure my OpenVPN server?