First Person:
First person is cool because we get right under the skin of the character, seeing and feeling what they experience, almost first-hand. Writers often say that first person gives their story "immediacy," meaning we're right there inside the protagonist. We identify with the first person POV closely. A lot, if not most young adult (YA) novels are written in the first person. Chances are your project will be too as most apprentice writers begin their careers working in first person. It's generally easier for newbie writers to understand and use.
First person has some downsides, though. It can lead to the overuse of interior monologue and exposition as, again, we're inside the protagonist's head and they are telling us about what they are going through. In other words, there is a tendency with first person to fall into the trap of telling, rather than showing. First person narratives can also suffer from "I, I, I" syndrome, where the narrative is littered with "I did this," and "I felt that," leaving the reader thinking the narrating protectonist is all about "me, me, me." You know that friend of yours who only posts selfies? Yeah, that. As the link below points out, the trick here is to get rid of the overuse of "I" through word choice, and to focus on what's happening outside the protagonist's head. But, of course, getting the protagonist's thoughts first-hand is one of the appeals of the first person POV.
Here's an example of first person POV from the opening of my middle school novel Iggy's World:
Testing, testing. One, two, three. Is the mic on my phone working? Check, check. I'll have to keep my voice down. My dad's filming a show right now. I'm recording this podcast just off the set.
Here we go! Welcome to Iggy's World.
Hi! I'm your host, Iggy Zambini, and you're listening to episode one of Iggy's World, a podcast about insects. I know, I know. Insects make your skin crawl. But don't tune out yet. This podcast isn't just about bugs. For example, today I'm recording this from the set of the sci-fi web series Great Big Bugs in Space. Because, you know, the show is about great big bugs in space.