Had a few lessons, love it, got as far as rising trot and can usually direct my horse left/right successfully.
My issue is with stopping. 3 different horses I've ridden now where I just can't come to a halt unless the horse in front of me stops too. Even if I'm the only rider, sometimes I'll try to halt and my horse is like "nah, let's carry on!"
I went on my first hack today and really managed to piss off a woman who wanted to ride in front of me with her partner (he partner was already in front). My horse wouldn't stop to let her past and if she tried to trot past, mine raced her! and no protest from me made any difference.
So how do you stop a horse that just wants to carry on/follow the herd?