The best advice I can give new homeschoolers (for kindergarten especially, but for more than that age) is to not get too attached to your chosen curriculum, or materials and toys for that matter. Some kids love the new routine, especially if it means one on one attention. Some don't like it at all. Sometimes there is a mismatch between the curriculum and your child ( or even you!) and at that point you need to let it go, no matter how highly recommended it came from a friend. Remember that kindergarteners would get along just fine without any change in routine at all. Curriculum at this age, I think, has more to do with a parent's peace of mind than any real advantage over non-curriculum ways of learning (and of course, some states make it difficult to work without one).
Common pitfalls at 5-6yo: math workbooks can depend too much on writing, which is still an emerging skill; reading, which was so fun with stories, suddenly becomes work; after acing addition your son suddenly "gets" multiplication but the curriculum (or the parent) isn't flexible enough to skip subtraction for the moment; other subjects lean on reading skills which is still in its infancy for most kids, making history more a reading lesson than a lesson on history. These skills are far more about individual development than any progressive work. Kids have an uncanny way to throw a wrench into the most well-researched educational theories.
So, I'm not recommending No Curriculum At All (though it's worked for me). Curriculum tends to put parents in the mindset of "I paid for this, it was recommended, I can't just set it aside", "the curriculum states this skill is next, I don't feel comfortable skipping it" or worse, "Something's wrong with my kid and/or my ability to homeschool."
I'm just saying, "Be willing to let this go if it's not working". And it doesn't stop with curriculum: that's the case with just about everything with homeschooling at any age.
"Let me see you stripped down to the bone. Let me hear you speaking just for me."