You can do Myler Bit trials. Look into it at your local tack store. You can also contact Myler themselves and ask for help. That wau, you can try bits without having to buy them, and then when you find the one you want and what works for your horse, you can then invest in one.
I love the bits, I love how they are designed and how they work. I own a few. A Full Cheek Level 1 Comfort Snaffle, a D Ring and an Egg Butt. All Level 1's because level 1's are accepted in the dressage ring.