Hello to all

I'm completely new to this kind of things. I buy a TP-Link router, the Archer MR200. I connect it and auto configures itself. After that i need to open TCP/UDP ports, i watch other topics here in forum or TP Link videos in Youtube, explaning how to portforwarding ports for games and other things. I do that and they still closed. I see it in CMD and in a website. After buying the router i have the NAT Strict at home, and as i don't have access to the network settings at home, i decided to buy the TP Link 4G router and a vodafone 4G SIM card to be able to use it on special occasions. Now with this router i have NAT Open, but the only thing i don't have is TCP/UDP ports open, they still closed. For example, I want to open Microsoft TCP/UDP port 3074, i put it, and nothing, it stays closed.

Please anyone help me,this for sure can only be settings on the router, but I don’t understand much of it, just the basic things

I hope anyone can help me

Best regards

Miguel