I need help port warding my nintendo swhich

Hiya well i am on a WISP internet and they use a Miktotik router. everything else works fine i can play mmos on the computer and such but my nintendo swhich seems to be what is called NAT type B.

after googleing and googleing i can’t really find anything that could help me fix my issue. i also notice on the i guess main page of the router site the upnp isn’t click but the NAT is turn on. i could take a screen shot if needed. i tryed looking into the more advance setting and well it all so overwhelming and i don’t want to mess anything up just wanting to fix my NAT issue so i can have type A to play with friends.If anyone could help me that be great. idk to click the upnp on or how to even portward the game console itself.