You might find this chart helpful:
http://www.mouseguns.com/PocketAutoComparison.pdf
On the chart you'll notice the blue line on every gun... This is important for you because it shows the relative distance from the back of each grip to the trigger.
I like Kahrs and find them relatively soft-shooting for the genre.
The Ruger LCP is extremely popular and reliable.
Also, once you settle on a gun that feels right, pay attention to the ammo you buy... Mouseguns tend to be kinda snappy so maybe you'll be better off starting with the lightest (least powerful) loadings you can find. You can always "move up" when you're ready, if you want to... after you've shot quite a bit at a range.