Is it good quality for comic ?
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And futa bonus
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First off yes it probably is. I've seen other comics with this quality level. renders look decent. Character is decent and comparable to others you see in this thread.
Having said that this frame isn't very special either. (I hope I'm not to harsh just spitballing with some ideas to improve the render. And I'm far from knowledgeable on comics)
I'd see if you could make the speech bubbels a little more exciting and professional looking. Maybe a very light grade from white to grey or some transition between background and speech bubble. Anything to make them pop a little. Try to get inspiration from your favourite comics. How do they draw the eye to the speech bubble.
Think about the font you want to use. The font you are using at the moment is very 'standard font of image editor.' Try to find a font that fits the tone of the comic but make sure you don't compromise on readability (A comic with pink text in a cursive handwriting style will not be read

). and center the font so it fills the speech bubble better.
The image itself is a bit generic (maybe not within context, can be a decent setup for cheating husband for instance) but could it be cut without making a compromise on the story? Comics, coming from print, want to make sure their pages are as action packed as possible because dead space means higher cost and less profit. (in the broadest sense of the word action. Emotional development is action as well) Even if you aren't trying to make/imitate a paper comic book it might help to keep it in mind so you can better emulate the comic style.
Also feel free to crop the image. There is nothing in this image that needs this large of a viewangle. It would probably work just as well if you only showed the head. plus a little background for the speech bubble. The great thing about comics is that they -unlike VN's or movies- don't need to keep their frames to one aspect ratio as long as it works on the page.
I hope this helps you develop your style for your comic. Again not a bad start and see the above more as ideas to think about rather than a harsh critique.