CBD vape oil can have varying effects on individuals, so it's smart to listen to your body and switch to a different method if needed. Trying out e-juices with zero nicotine sounds like a good move, especially if you're looking for a similar experience to menthol tobacco.
First of all, I remind you that Domain Authority is not a Google ranking factor and has no effect on the SERPs.
But I agree with what was said above: content is the only solution to receive backlinks that will increase your DA