Hey Y'all new the clipless world

here are some bits of advice i have given my students:
1) try it inside or outside leaning against a wall. clip into both pedals
2) try practicing clipping in and out with each pedal (one foot on the ground). this allows you to make sure the setting is ok. if it is tight try loosening them (there are two screws, for spd's, one in the front and one in the back. for time pedals you flip the cleat around. i don't recommend time pedals for beginners.)
3) one of the best places to practice ANYTHING to do with balance is on grass. it provides a nice soft landing if you fail to unclip.

hope this helps

good luck!

Han