Secure, 100% Privacy Conscious setup for Remote Access

What home router do you have? A number of them can provide a VPN server. That with Dynamic DNS (DDNS) might be able to give you access to your home server from anywhere. For example, I am running Asuswrt-Merlin on my home router with DDNS. The router runs a Wireguard server. With Wireguard clients on my devices, they can access anything I am running at home. I believe you can setup the same type of thing using any router that can be flashed with OpenWrt. It will not, however, work if you don’t have a publicly accessible IP address. If your ISP is NATing everything (mobile carriers in the US seem to do this across the board) then you will need something more like Tailscale.