in my experience, the negative prompt field is just as important as the positive one.
you may have noticed there's also important modifiers , specifically the use of brackets and numbers next to a prompt.
LORA's and other add ons are extreamly helpful so i advise you to learn about those after you get the basics down.
i found the following examples to be useful in improving realistic generations, but is still useful for artistic generations too (i'll highlight them out in the example)
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"(((NSFW))), (((nudity))), (((Photo-realism:1.2))), (((Nikon Z9))), (((DSLR))), (((8k))), (((masterpiece:1.2))), (((extreme detail:1.2))), (((realistic:1.2))), (((ultra high quality))), (((absurdres))), (((HDR))), (((perfect))),
1girl, (((skinny))), (((wide hips))), (((smile:1.3))), (((freckles:1.3))), (((beautiful face))),(((realistic eyes))),(((perfect detailed face:1.5))),(((perfect detailed body:1.5))),(((perfect detailed eyes:1.5))),(((proper anatomy))), perfect hands, perfect fingers, perfect feet.........
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(lowres), (worst quality), (low quality), (fuze:1.4), (bad anatomy), cartoon, anime, comic, drawing, illustration, bad hands, bad face, text, error, missing fingers, extra digit, fewer digits, extra hands, extra arms, big ears, cropped, worst quality, low quality, normal quality, jpeg artifacts,signature, watermark, username, blurry, artist name, bad skin........
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so the curved brackets , and the numbers are supposed to add emphasis on these specific prompts and prioritizes them over the other prompts in the field. higher numbers and more brackets adds more strength to the particular prompt.
in all honesty, i still haven't worked out the correct balance so i play around with the brackets and numbers a lot, but advise you to start low in the amount of prompts, number strength, and brackets, and work you way up with each new generation until you get what you want.
check out civitai.com - check out a few of the models, Lora's, etc. look up an image you like and check out the prompts used to make it. 4chan also had a really good guide, but be prepared to do a LOT of research and a LOT of trial and error before you get anything remotely good.