I am a hockey nut
AND
him not noticing you right away doesn't mean anything....he is probably into the game

make note of some specific moves on the ice

hang out for a bit and watch the game....not husband.

really...watch the game, not your phone, and try to imagine what the things are that he likes about it

then comment on those specific things later

(like...that icing call was bogus or why wasn't that high sticking called in the 2nd? Holding much? )

because hanging out and taking interest in hockey is really that...taking an interest