HI I am new to mini's and I was thinking of starting my little guy doing a bit of ground driving this fall. I bought a surcinge but I am not sure what kind of bridle to buy. I want to teach him to drive next summer but for these first lessons should I introduce him to a regular headstall, snaffle and long reins or should I just go with a driving bridle from the beginning. The driving bridle that comes with the harnesses are all have blinders on them. Also how to I measure for bridle fit? I don't know if I need a mini or a pony size . My little guy is about 34" tall and the regular mini halters are too small but pony halters are way too big.