I genuinely don’t think there’s a better place to see that pats win in the regular season than at MetLife, I’ve seen us win thrillers against the Jets/Giants and heartbreaking losses against the Jets. I’ve been on my own, with my family and with friends. Always worn pats gear, never had anything other than friendly stick on my own or with family. Had plenty justified abuse when I’ve been with my mates, but we’re as loud and obnoxious as they come and have just as good as we got. You’ve got the added bonus of being British, you’ll be fine to wear pats gear.
Train from Penn station, change at Secaucus is the best way. Tir Na Nog opposite penn on 31st is a patriots bar and is home to the NYC pats fans, there’ll be plenty pats fans in there before and after the game.
New York weather in November is as unpredictable as the UK weather. Could be shorts and T shirt weather could be 3 layers and full waterproofs.