spiral in and out on a circle . From the quater line to outside track and track to quarter line. Out hacking go across lanes and tracks. x
Hey ! I would start with leg yield as it is the easiest for the horse to understand.
I start all of mine off first in hand so walking by the head facing backwards- little half halt on the reins then a tap where your leg would go with a schooling whip and say 'over.'
It can be easier to do a few strides on a circle first until they get the idea, then straight lines, then move to being in the saddle.
There are a lot of exercises to do like: turn on and about the fore hand are good, rein back, serpentines, halt to trot vice versa, walk to canter vice versa then halt to canter, leg yielding.
The list is endless :)