I love my heels and I am 6 feet tall.
As everyone knows the higher the heel the more difficult it is to walk, but not all shoes, even if they are the same height feel the same, some specially some high heel sandals are more difficult to walk with and it is not necessary because they feel flimsy, it more that the arch that the shoe has less or more angle; I really don't know the exact problem.
There are some 4" inch shoes in which I can walk like an expert but the sweet spot for me in heels is about 3.5 inches, unfortunately it seems that even on a size 11 which is what I wear, most high heel shoes are made with 4" heels.
Keep practicing and you may feel better wearing a wide width size so that the foot feels less discomfort.
Good luck and this is really one of those cases where "practice make perfect"
Emily