Discoloration and brown tips

yes, this is overfeeding.. the nute-burn is still very low, but the intensity of the green of the leaf indicates that she was given a lot of nitrogen.. Unfortunately you didn't provide more information like the growing medium, the type of nutrients, the amount of nutrients and the feeding schedule, else we could have given some recommendations on how to address this. I would definitely start out with lowering the amount of nutrients. happy growing

You are doing it right. A little tip burn means that you pushed it to the limit. This is better than healthy but too small plant.

Your leaves look very dark green and the tips are burnt. This would indicate nitrogen toxicity. You might want to research that one and see if your plant fits the criteria. I think you are likely slightly overfeeding nitrogen. I would suggest diluting your nutrients a little more if the NPK ratio is appropriate. Are there any other symptoms presented?