You know you can still remain friends, right? It sounds like that’s the part of the marriage you still miss…
There’s literally zero reason to cut off all contact unless that’s what she has explicitly stated (or that you want). I’m still very good friends with my former wife, for example, and we split over 14 years ago now and still talk at least once a week.
The only caveat I would give is that you are both firmly in each others friend zone’s here. You both have to be OK with each other dating - no jealousy. If you cannot handle that, then yes, stay away.
It also means any new partner you get will have to be OK with that, too. They will have a right to be jealous and discuss that with you, but it’s not ok for them to say you cannot see your ex, if that’s what you want.
Not a hockey fan either, but I’ve often asked this question of my friends that are. They all same the same thing: The fans enjoy and expect it. To me, it’s dumb. One team ends up a player (or two) down, and that’s when a lot fo the scoring happens. Ergo, you fight and you are more likely to lose. Pretty much any other sport in the world and you’re off the field of play, and often for a long period of time.
FWIW, this is also why I’m not a hockey fan…