@Alessandra592 I have this thing called a draft. Like I'd just hit new story and title hyunlix for the time being and title the first chapter as draft. There'll I'll put in everything . From character sketches, to overview of the plot and what I intend to write of each chapter. Then I'd create a new chapter and start writing the prologue and chapters.
Of course, you're new to the whole thing and I too was initially but that's totally alright. If you're particular about formatting like me, you could paragraph scenes and thoughts or you could use one liners or lowercase the whole thing like some authors would. Maybe create playlists at the very end once you're sure about the vibe of your book.
Though I've made 10 ffs or smtg I still tend to get stuck so dw too much. The point is to get started! If you feel like you're not progressing, you can always write all the chapters and then come back to ch 1 and re-edit it until you're satisfied which is smtg I do.
So yeah! All the best with your book and when it's ready, you can always link it here cuz I won't delete this conversation and I'll be happy to read it!