at first welcome
Your blade should be able to cut hair after 4k . Now i would suggest go back to 4 k and stay in that stone until you will pop up the hairs. Then you can go to 8 k.
Please make sure with marker test your blade bevel has been set and whole edge touches the stone before moving to 4k.
8k sign which you will now it is sharp enough. will cut hair without poping as soon as blade touches it fols down.
i am sure you will get a lot help and good luck.hope this helps.

And lastly if you are in usa 1 of us can help you out by sharpening your razor Free. in this case you can guide you in future and know how sharp your razor should be. gl