Ofc I can give you some advice! When writing a you chapter could try planning ahead before you write a chapter, like in your notes app, you could also use grammar apps to have better writing or reading other fanfics that have good writing and studying how the way they write. Also you could search up on Pinterest “writing prompts” if you have an idea but don’t know how to write it. Hopefully this helped good luck! (Also tbh in my first fanfic my writing wasnt great and felt like I was just putting my thoughts but usually first fanfics don’t have to be perfect but if you continue write your writing gets better as well :)