You can still autoattack and move. At higher levels, you'll have many more ranged CAs and a few snares, which (if they're actually working that week) you can use to slow the mobs and lengthen the amount of time you have to pound them with ranged CAs before you either close to melee or begin kiting with ranged autoattack. The root component on the Lunge line is helpful, as is our Cheap Shot stun. Even the 2 second interval on ^ mobs will buy you enough time to start backing off and using autofire. Unfortunately, the mobs now run faster than we do, so they can close ranks even when we get a headstart on them.
For now, keep your head up and learn to master the stun > back / stealth attack, that's going to be crucial at these lower levels. You'll get a lot more ranged attacks as you level past 20 or so. Good luck.