Here is a video recording of my US-RSE talk from May 2021:
You can also download the PDF of the slides.
My suggestion would be to start with one-on-ones. Here is a quickstart guide (PDF, epub) to getting starting with one-on-ones. It lists out daily steps and resources to get one-on-ones up and running over the course of a month.
Other resources presesnted in the talk are below -