Alle responds to: "1st-person POV or 3rd? Which is easier?"
Spoiler alert: NOTHING about writing is easy.
First person is a challenge in that you have to really work to get other-than-the narrator’s perspective into the story.
Third person has its own challenges: with each line, you have to be absolutely clear as to who "owns" it—who is speaking or thinking or doing something.
Writing in first person is what, initially, seems to come most naturally to many. While doing it well isn't easy, getting out those first thoughts is easier than doing so while thinking about—well; everything that third person demands.
I use first person in my first novel. My second novel, Crazy Medicine, is in 3rd-person omniscient. It was much harder to write, I will say that—although once I got into assigning every line, there was a lot of freedom.
And:
To argue with the statement in the first slide of the video, above: “First person gives the story a distinct voice.” Well, so does third; if you’re doing it right! Having to assign each line an owner distinguishes the voice of the narrator from that of the main character.