Maybe Port Forwarding issue - Foundry VTT

Hello.
Not native nor IT wizard here, please be lenient.

I'm having some issues understanding/configuring port forwarding to be used for Foundry Virtual Table Top.

As said in the FVTT configuration process i need to forward the TCP port 30000.

I did it but keep having the "connection refused" whenever someone tries to connect "to me" (read FVTT program).
Here's what i've already tried, with no positive results:

DMZ on my local IP
Checking windows 10 firewall rules
Disabling Windows firewall
Port forwarding in these ways:

• External starting-ending port=30000 / Internal starting-ending port=30000
• External starting port=80 - ending port=8080 / Internal starting port=30000 - ending port=38000

Port triggering (don't know why i did this, just an option):

• Service User ANY, Service type TCP, triggering port=30000 / Inbound connection service type TCP, start-ending port=30000

Local IP is 10.0.0.1, internet IP default/automatic set on 192.168.1.200 ...this is making me suspicious.
I don't know anything about "network management"... and that's all i could figure out.

Any advise?

Thankyou very much

D.