My recommendation is not to only prompt the exact emotion that you want. I've had a lot of great luck by thinking of moments that might evoke those emotional states and put your characters in them. "Getting a new puppy" might create a more overjoyed state but will also generate a puppy. Just thinking like a director rather than a painter or a photographer gives me more interesting results. I hope that helps.

You could try blending in some TIs from something like this: https://civitai.com/models/8860/scg-emotions-pack-simple-embeds-for-easily-controlling-a-variety-of-emotions-for-all-15-models-and-merges

Is this oc?

It definitely depends on the model. But if you want better results you're going to want to use adetailer.

I threw your prompt into dreamshaper 6.31 (because it's the latest version I had on my server). Here's with no adetailer:

Here's with adetailer but using the exact same prompt as the main image (leaving both fields blank but turning adetailer on):

Here's with adetailer but putting only the expression part in the positive prompt. Negative prompt still the same as the main image.
(confused concerned upset questioning (funny fun amused (cringe (raised eyebrow) shy blush ashamed bruh face), <lora:add_detail:1.2>

Now, probably a good idea to have redhead woman in there or something, but my point is how rapidly you can improve things with very minimal effort. If you're willing to mess around with adetailer prompts and denoising strength, you can do a lot with faces.