Hi PB
If you follow Miner's advice you will decide whether aerobars are right for you or not, but if you decide to use them, here is what I did to get the hang of them ...
First, ride more and more with your hands on the top of the bar, and close to the stem (ie away from your brakes). Put more weight on the bars by shifting forward in the saddle.
When you are comfortable with this, grasp the aerobars closer to where they attach to the handlebars - you will have a tad more control here. as you get better, slide further and further towards the position you should be in, and put more weight on the elbow pads.
But all this is getting too far ahead - do as Miners suggests and get properly set up on the bike by a pro.
In the meantime, it won't hurt to leave the aeros attached to the bike, so everyone knows you're a triathlete and not just a cyclist
Muz