As a photographer and particularly as a Nikon shooter, I find Joe McNally a "must-follow," particularly during the Olympics. You will find images on his Instagram and stories of his experience on his blog.
On both platforms, he shares recent images, background stories, workflow and tips. He is also known for responding to comments. I recommend in particular an interesting blog he wrote about his workflow at the Rio Olympics. And, he has already posted a couple of stories from Tokyo 2020.
Some photographers are knowledgeable. Some are skilled. Some are artistically gifted. Some are nice. Joe McNally is at the intersection of all of these qualities.