Hey Ted and Pete, LinkedIn sales nav has a native integration with Hubspot, you can just go to the Apps section in Hubspot and connect it there. You can then use LinkedIn steps in your sequences within Hubspot, I had some of my reps doing it and sending linkedin messages straight out of Hubspot.
In case you want to integrate LinkedIn to Hubspot without a Sales Nav license, you can use Heyreach + Zapier to do it.