Ct value or Cycle Threshold on an RT PCR test just tells you how much is your viral load. Lower your Ct value, higher is your viral load. It basically means the number of cycles the machine had to run before it could detect the virus in your sample.
The Ct value in the RT PCR test does not affect you or your COVID infection in anyway. You don't need to worry about it.
You don't have to take any 'extra' precautions. You have to take the same precautions as any other COVID positive patient - Home isolation, adequate rest, etc.
Next Steps
If you have mild symptoms just stay isolated, eat nutritious food, Do steam inhalation. Take Crocin or Dolo 650 for body ache or fever.
In case you notice that you are having a bad cough or very high temperature or feeling breathless or extreme weakness, consult a doctor immediately.