hiii! honestly i haven't been writing for long so i'm not sure if my advise will be useful :') but! i will say that i have different approaches in writing drabbles/fics.

drabbles:
i actually posted a screen recording of the process not too long ago :> basically it's just word vomit with whatever's on top of my head that i'll either write it on x right away (which is usually the case) or my notes if i'm out. i like writing drabbles bcus it really limits me to write only the most important dialogue & actions, since it's meant to be short. but if we're talking abt planning, unfortunately i dont do any :') sometimes the hardest part is to start & once u do, the ideas will come naturally!! just write whatever ur mind takes you. someone out there will love your silly idea i promise

fics:
i do try to map it out, have a rough outline of how i want the fic to be & scribble them physically on my notes. but i will admit, almost everytime it never ends how i planned it to be & i think that's what makes it fun!!! i do struggle with writing fics a lot more since it needs more in depth plots, character building etc. for me personally, i like to go to wordhippo/pinterest for synonyms or if i need any guides on specific parts. yes, pinterest is very veryyy helpful!!! i dont even use google to search for stuff (other than further research on the topics) but pinterest is the way to go for me, try it if you havent already. you can get guides on how to naturally write kiss scenes, fight scenes etc, micro expressions and so so much more oh i love it sm i highly recommend it

another big tip is when you feel like you're not getting anywhere with your writing/u start to repeat ur sentences/writing style, read other people's fics. seriously. there are sooo many amazing fics out there that you can learn from. i love reading all ships, i think all fics deserve love bcus writing takes so much time & energy, so hats off to all authors seriously im always so amazed with how much people write :')

lastly, enjoy the process!!! i promise when you do, it bleeds through your writing and sometimes (if not most), your readers can tell!!! and that's where you meet amazing people who'll support your writings <3 i hope these are helpful hehe i think i just word vomitted here lol