Here you can see how/where you can wall jump Play Video And of course you can do this if an enemy champion is standing near a wall but it is much harder to master.

In lane your basic harass combo is using your E on to jump trough minions then E Q basic the enemy and escape by dashing back trough minions.
Remember to stay on move by dashing trough minions to make it harder to poke you.

you can easily catch your opponents of guard by using flash immediately after dashing to minion and using your Q.