DockFlare is a free, open-source tool to manage Cloudflare Tunnels
I can see the light at the end of the tunnel.

There are plenty of ways to secure your self-hosted apps and access them from outside your home network, with varying degrees of knowledge necessary to get them running safely. You could use a VPN, or something like Pangolin or Tailscale, but given how prevalent Cloudflare is, they've got a solution that's almost as easy to use as its DNS registry.