Hello and welcome, Josiah
Congratulations on completing your first project without using a tutorial. Haven't checked out the code, but it looks very good to me .
I've only been studying coding since January so don't take my word as if I'm some sort of expert, but I'm pretty sure the issue you mention has nothing to do with indentation. It's probably just a matter of playing around with other simple properties in your <p> element like font-size, paragraph width, margin, padding, or something like that. Just try different combinations and you'll get it looking right.
My advice though, would be that you don't sweat the small stuff: when it comes to the visual aspect, what's truly important is practicing your layout skills. Not saying that you need it though! Just that that's where the meat of the issue is: learning how to organize or center elements, working with margins and/padding, using the Display and Position proprties, Flexbox and Grid, that sort of stuff. Other things like changing font sizes, families, can be done very quickly, so don't get too hang up on that. Good luck on your coding journey!