Hm... well, it depends I guess. I use Construct Classic still, despite Construct 2 being around, simply because it has been around longer and has more plug-ins, examples, tutorials etc. I haven't actually checked the latest release of C2 yet, so I'm not sure how far it's gotten yet... <img src="smileys/smiley36.gif" border="0" align="middle" />
Seeing Construct Classic works similar to C2, once you learn CC it should be pretty easy to get into C2. When I first started, I created a game similar to Ghost Shooter, which is a tutorial that comes with CC. It's a top down shooter, with basic enemies which used a Bullet behavior to move them forwards and the Turret behavior to control where they pointed. I think. It's been awhile. I learned Construct by going through these examples and learning how each part of it worked, and then re-creating it with my own graphics and adding new aspects to the game, like ammo, shields or different types of enemies.
There's a large list of examples/tutorials for CC here: scirra.com/forum/examples-tutorials-list_topic41594.html
I'm probably not much help, because I'm certainly no professional yet. The hardest bit with starting is trying to get around that you have to stick with slightly boring games until you're confident enough to make something amazing. I'd try to create something like Pong, or a simple top down shooter. I put emphasis on simple! <img src="smileys/smiley1.gif" border="0" align="middle" />