WireGuard easy setup

Hello guys!
I need help with setting up WireGuard easy. The system in use is TrueNAS SCALE, the latest version. I am doing this with minimal expertise, and I would like to solve it under the GUI. I have a DDNS name. There is 1 network interface, the physical Intel Ethernet card. My router is a Sagemcom F@st 5670 provided by my ISP, and only port forwarding is possible, there is no option for setting up static routes. One thing is important to me, I want to reach all IP addresses and devices on my own LAN network. My network is: 10.0.1.x/24. I have tried many settings, but none have worked, I can’t ping a single device from the remote VPN client.
Thank you for your help.