How hard is Songwriting ?

So I'm a High school senior and I have always liked to listen to songs . So a few days ago I got kinda inspired from a few singers (Nafeesisboujee, Bruno,Yung Kai) to maybe create a new song and sing it at my school . So i had joined this sub in the hopes of getting some beginner tips. Now I want to tell to ya all that I have almost no experience in writing or even singing a song so I don't have any idea on how to start creating new songs . I don't have a teacher or anything else and my school is totally academics focused so I'm not in any music clubs either . So when I saw the various posts on here about songwriting I almost lost all hope seeing how difficult it was for ppl who were more experienced than me . So my question is - Is it possible to create good songs if u have no teacher and no prior experience ? And if it is then how can I start writing new songs ?