GP Shoestring
I wouldn't think it's a good 2nd plane for these reasons;
1. It's fragile. It will not take much abuse. If you blow a landing you will blow out the landing gear and that will take the bottom of the fuse off...major damage.
2. It's fast. Three times faster than a trainer which would have been your 1st plane.
3. It's neutral. Not self righting, you fly it from takeoff to touchdown.
In a nutshell, you have to be a very competent pilot to enjoy flying it. It's not hard to fly if you know what you are doing. I know when I was on my 2nd plane I did not have the experience to successfully fly an airplane with the performance of a racer.
my .02
Yak