Did my kimchi go bad?

Hi, there are a number of things that could go wrong w/ ur kimchi:
1. You didn’t salt it enough
2. You didn’t let it sit at room temp at least 6-8 hrs before refrigerating
3. Your fridge not cold enough or too cold.
What you can do to check if it is still good to eat are:
1. Check the smell ( is it sour or off like rotten veg?)
2. Check the juices (is there any juice collects at the bottom of the jar? If so, is it cloudy or clear? Does it cover your kimchi aka submerge your kimchi in it?)
3. Finally check the taste. If it got moldy on top, remove all the top layer and toss. Then press down to make sure your kimchi is submerged in its juices

I had a similar situation. I made pony tail kimchi that I made a month ago. The top layer had a white-ish tint. I removed it and the rest tasted fine but the kimchi had some gritty texture on my hands when I was working with it. I was making braised kimchi rolls. I’ve never handled kimchi before so I’m not sure if the grainyness was wrong.