You hear a sizzle - GOOD. That mean the thing is working.
Now when you take a draw on the mouthpiece, it might feel a bit tight, so try to make a slow draw. And yes the battery electronics does a protection thing to autoshutoff after about 10 seconds to prevent accidental over heating and fires from people leaving it in their pocket on in bags etc.
If you want to loosen the draw you can try unscrewing the
tank a little, but listen for the sizzle sound to verify that your
tank is still electrically connected.
When the battery runs down and needs rechanging it would blink
10 times.