Dropping some writing advice somewhat specific to feedism:
Develop your characters, develop your characters, develop your god damn characters. Unless you're writing a short vignette, they should have lives and personalities and individual voices. Maybe friends and a day job and hobbies. Can I read about a character being essentially a 500-pound dildo or fleshlight while their partner simps and thinks of nothing but their body? Maybe for 500 words. After that I get bored. Tell me who your characters are and why they want what they want!
Consider your characters and your audience. Are you writing solely for the seasoned feedist? Are your characters in an established feeder and feedee relationship? If so, feel free to use the lingo of the kink. Are you writing about beginning feedists? Maybe consider them learning the lingo together? Are you writing something you hope the civilians will enjoy too? Give them a little backstory, make them sympathize with the reasons the MC wants to be fat.
Dialogue is everything, both internal and spoken. Consider your MC's internal monologue and take into account their heritage, socioeconomic position, personality, sexuality, and neurotype, esp if working in first person but this can also apply to third-limited. Practice your dialogue out loud to see if it seems realistic with your character. Are they wordy, or minimalist? Are they more visual or tactile when it comes to stimulation? How do they view the world around them and how do they view their partner? Do they have any verbal or mental quirks? And how do they describe the sensation of fat? Is it more a casual pleasure, an accident, or a need?
Finally and this goes across the board for all stories: exclude extraneous detail. If you mention a gun in chapter 1 it had better go off before the end of the story. At the same time, don't leave out necessary detail. Don't write the Christian Grey of feedism; if you're going to introduce a billionaire feeder at least explain where this money is coming from, etc. Tie up your plot holes.
For more general writing advice I would highly recommend Jenna Moreci's channel on youtube.
3 years