Two answers... Blue-pill, Red-pill.

Answer A: Wait. When you are confident on your trainer, you will have a better idea of where you want the hobby to take yu (3D, Pattern, Scale, Warbirds, maybe heli, etc....) and you will make a purchasing decision based on bettter info... also, you will have changed the CG on the trainer, upped the control throws, and you will be having a blast with the trainer. Your second plane should be a kit because half the fun of RC is building (and the silly instant-gratification people out there nowadays are missing the fun that a patient builder has ... ;-) Everyong has to build at least one kit before they are a true model enthusiast....

Answer B: Go ahead and get something that exceeds your expectations of your abilities .... you will assemble the ARF, and it will be itching your palms to fly it. I would venture an 80% chance that you will successfully fly it, and you will actually rapidly "ramp" up the learning curve, and will move on to your second plane without a hitch.

There is merit to either approach. "A" is more conservative, but more importantly, the patience requiref for "A" will reward you with novel aspects of the hobby that you would not otherwise appreciate. Answer :B: is exciting, and more risky. I personally went for the "B" route (trainer to a Great Planes UltraSport+). I crashed on it;s maiden... but then I got to go route "A" because it took me 2 months to rebuild the UltraSport, and in that time I got to really master the trainer.

So, there is no right answer. I really do recommend that you build a kit. It is hugely satisfying flying something that was once flat-packed in a box.

Anyways... i is late and I ramble.

gus