If you are sensitive to it, that means your body needs it.
For me, the early experience was that it would take 1 - 2 weeks to adjust to whatever amount I added, no matter how small. Then I would increase a tiny amount -- the same amount, something easy to manage, like a half a pill or whatever, so the amount is not changing too much all the time -- and then later, I found that the more you take it, the shorter the adjustment phase will get. Pretty soon it's only 2 days to adjust, so if you increase a dose you only need a weekend. Eventually you might not even notice an increased dose, although I've never gotten to that stage.
So it's not the amount, it's the process, the method, and how you can best take care of yourself. You have a lifetime to build up the amount you take.
Just remember to take enough potassium to offset the side-effects and set time aside to cope with it without too much stress, anxiety, and muscle cramping. Don't push yourself. I had many days of waking up feeling sick or getting incredible anxiety at various times, but that was before we know that potassium would help. It's very central to the process, in whatever form you can manage to take it in.
I typically go to bed with a 1/2 banana and a cup of coconut water, in case I wake up and am sweating or muscles cramping or feeling suddenly wide awake -- potassium helps those.
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