Sorry but I haven't heard of the "Frog", and most people here probably haven't wither.
I will say this, the PT Electric isn't all that big or powerful a plane, so you should do okay moving from a small foamie to the PT, especially seeing as they're both 3 channels.
Now, if you were asking about moving from the Frog to a PT-40 with a 46 glow engine, I'd say get more help for your first few flights.
Good luck, and have fun.

Dennis-