Before refrigerating, you can taste it to make sure it's sour enough and to your liking. Also, it's important to check color and odor for safety (any mold or foul smell, I recommend discarding the batch). Now, you can remove the weight and airlock lid and replace the latter with a normal mason jar lid. Just make sure all cabbage remains under the brine. You can keep the insert in the jar to help you with that. To your gut health! Enjoy!