Lactose and milk proteins, even small amounts in kefir, do not agree with everyone. So be careful and listen to your bodies reaction.
Some people do better on low carb than others. 5g a day is a bit low for most people, I take in around 30g to 50g, and others do well on much higher amounts, you must listen to your body.
Pollen is not necessary, but small amounts of a quality source shouldn't be a problem..... if your eating raw meats you should be able to get much larger levels of amino acids and vitamins than pollen contains, and in a much more bioavailable form.
Honey is a very debatable food on this forum, some say raw honey is better tolerated, but all honey is loaded with sugar, and if you are avoiding carbs you should limit the amount, depending on your own individual wants and needs.
I have been using a little home made kombutcha, it may be a good alternative to cultured dairy....if it is properly fermented and not overly sugared, it should only have a couple of carbs per serving.