hiii, no problem! first thing i'd say is to wait for a more active period, bc wattpad's kinda dead atm. summer tends to be a bit better! tho that might be different in the non-kpop af sphere, i'm not sure. but the main piece of advice i'd give is to start with a manageable project. don't be like me lol. a reasonable amount of slots, a simple premise, and not too many chapters! writing a whole story is hard, but the shorter the easier. and if that goes well, then you can be more confident when you move onto meatier projects. i made that mistake with off limits, and while i did finish it, i think it's weakened by its length. with born lucky i really tried to tighten things up, and i think (hope?) the pacing will be better for it.
now the other thing i'd say is to actually go in with a plan! a lot of people prioritize cool concepts over story and end up realizing after like 2 chapters that they don't actually know where their story is going. yes, forms will bring in additional details and plot points, but you can't rely on them entirely! it's really important to have the main frame somewhat clear in your mind, and then be flexible with it when you get other ideas from the appliers. in general i'm a very big outliner so i don't rly know how pantsers do it. but that's sort of my process ^^' writing is sooo much easier when you already know *what* you're going to write