Opening and forwarding ports

A bit basic I know but have to start somewere…

I can ping and find ports 22,53,80,443,3283,5900 are all open which is what I want.

However, I cannot log into router from wan so assume 443 is not forwarding?

Also, cannot work out how to open and forward 3389 and 3390 for rdp.

Using LuCi interface. Anyway provide guidance?

Cheers

Michael