As somebody that has literally grown up playing hockey (since I was 3), even if I don't have children yet, this is how I would treat the situation.
1) Let your kid decide if he wants to play, do not force it on him. Let him develop a love for the game. Let him play other sports as well, not only does it help his hockey skills but it promotes physical activity and dexterity.
2) He will love what you love, all kids want to do the things their fathers do. Don't just send him to practices/games, actively engage with him or he will burnout from the sport quickly. Play with him, stick and pucks and what have you, have fun with your boy. Nothing will ever top the fun that he will have playing the sport that he loves with his father and those memories are something he will carry with him throughout his life. Watch games with him, grow his love for the game
3) Don't try and bump him up tiers/leagues. Let him play house league before travel so he can get a feel for the game. As he gets older experience gained playing 1st line on a AA team rather than 4th line on a AAA team is much more important to development. Know that he most likely isn't going pro, have him play where he will play the most.
4) Don't buy him top of the line equipment. Imo the only thing that you should splurge on is skates, they generally last a couple years if you buy a half size larger than he needs so he can grow in to them. As for sticks, they will break often especially as he gets older. Make him work for them if he wants top of the line; mow the lawn, do the dishes, whatever. Just make sure that his gear is comfortable on him, it doesn't have to cost a fortune.
5) Do not be a ****** hockey parent. Don't be that guy who screams at refs, coaches, fights other parents, ect.. Don't ***** at coaches because your kid isn't seeing enough ice time, your kid needs to understand that he needs to work hard and put in effort to move up in the lineup. Don't talk **** about other kids, that is unnecessary. Generally be hands off when it comes to team stuff.
Hockey is supposed to be fun, don't sap the fun out of the game for your kid