I hesitate to say this, but look at some other swordmage builds to see if there is some build other than ensnaring you might like to play, particularly if this is your first time. It's kind of a frustrating defender for the rest of the party, as other than providing a -2 to hit against your allies, you're not doing much of anything to protect them. Also you end up teleporting a critter away from your allies, when they really just wanted to beat him up, so it sometimes ends up being counterproductive all around.
If you play a different build like shielding swordmage, your defender effect will be much more evident and appreciated by your playmates.
I hate telling people "don't play that", because I'm a proponent of "play what you want," but in this case... Play something slightly different that you want to play.
Other than that, Genasi Swordmage is perfectly fine. Sword Burst is the staple for most swordmages. If you play a Stormsoul, pick a thunder/lightning power or two to use with Promise of Storm, like Booming Blade, and maybe Lightning Clash as an encounter. For feats, Intelligent Blademaster is a good start. For stats, you have some options, be sure post racial, you have at least an 18 intelligence and 16 constitution (18/18, or 20/16 are also perfectly fine).
Edit: I'll echo that some allowance to tweak the character as you play is a good idea, particularly since this is your first character. I've played with a lot of beginner players, and there are always rules that are misunderstood at first, or don't work quite the way they thought, or powers/feats that are just complete duds.
