just choose a quiet road, needn't be very long
go slowly along it and back, practice clipping in/out, do each foot alternately until you're doing it smoothly
you'll be doing a clip in/out every few seconds, even five minutes should have you doing it well enough
until it becomes something you do by reflex, plan ahead and unclip your left foot a few seconds before you need to stop (if you're not confident, unclip both feet)
once it is reflex you'll find you can stop, then unclip as the bike starts 'falling' to the side, but until then do it early!
check the cleats and screws every so often, if the screws loosen it can become very difficult to unclip spd cleats
I decided to give a try to SPD pedals, it will be the first time I rode with my legs clipped in.
Is it good idea to try with a one leg initially (put cleat on the single shoe) ?
My rides do not exceed 4 miles one way.
I have to ask, but what are the benefits to being clipped in?