Lute's name is Luther Nicholson, perhaps the song is used as an analogy for Lute to speak as his true self, rather than his hip-hop persona. This freestyle is about his come-up from driving a honda accord and being slept on, to rethinking his decisions and his mindset and coming to the realization that he really needs to stay on the grind because he knows it is a blessing to even have the opportunity pursue his dreams. Lute does a great job at explaining his backstory, then expressing the intrusive and self-doubting thoughts he struggled with on the daily. I think that this song is rapped from the perspective of his old self, before he blew up, and everyone just knew him as Luther, hence, "Luther's Freestyle" is manifested. Luther understood that to make his father(pops) proud, he would need to get up and get to it, regardless of how anxious he felt.
He proceeds to tell the audience that everyone doubting him has now left him no choice, but to go all in, as the only other alternatives are to stay stuck in his head and dealing with the anxiety and shame that comes with inaction. In all reality I have no idea about any of this, it's just my theory and analysis, let me know what you think!