The "Community" star goes on to address his decision to leave the NBC comedy this past August, clarifying that he didn't leave the series in order to pursue his rap career, as the public previously assumed (Glover performs under the alias Childish Gambino).
"I don't wanna rap," he wrote. "I wanted to be on my own."
Glover, who turned 30 this past September, took down his website and stopped tweeting for much of the past year, though he had previously been quite active on both.
His "Community" co-star Joel McHale told The Hollywood Reporter this past August that he could understand Glover's wishes to move on from the series.
"Obviously, Donald is a comic genius," he said of the former "30 Rock" writer. "His level of talent is pretty extraordinary and rare. His rap career is exploding, so I get why he wants to focus on it."
Glover currently has a new music-centric comedy, FX series "Atlanta," as well as a sophomore studio album, "Because the Internet," in the works. But the actor and comedian doesn't seem too confident about either project, based on his posts.
"I'm afraid this is all an accident," he wrote. "I'm scared I won't know anything ever again. I'm scared I never knew anything. I'm afraid I'll regret this. I'm afraid this doesn't matter at all."
"I wanted to make something that says, no matter how bad you [expletive] up, or mistakes you've made during the year, your life, your eternity," he wrote of his upcoming album, "you're always allowed to be better. You're always allowed to grow up. If you want."
Keep clicking to see the photos he posted on Instagram ...