It does get easier...I remember the very first time I tried one, oh boy, I had to hold my nose and get it down in one.....like you, I gagged..now, I love them...well, the choc and the soup only.
I make my choc up with at least 450ml water and crushed ice - eat your heart out McDs...I look forward to it every night!
The soup I make with at least 500-600ml of water, this is just recent as I used to use around 400 ml, but prefer it thinner now.
The taste does get better as your taste buds get used to them...just takes a bit of perseverance at the start.
Have a great week!