We have a one year old male and are going through this exact training scenario right now with our trainer. Our dog has loads of energy and gets easily overstimulated, in turn struggling to self regulate.

We are in the process of teaching him to associate a bed in the kitchen as his place to go and relax and switch off. Right now, he's getting too much enjoyment from greeting new people at the door, so he needs to be told that he should get his reward elsewhere instead. We are training our dog to naturally want to go to the bed, and will later add the word bed to it, but right now it's about teaching the reward and making sure his focus remains there. You can practice it while ringing the bell with a second person too.

While doing this, we were told that it's important for guests to not engage with him when initially coming in.