If you just wanna dip your feet, and expand your capabilities as a pilot, increase the control surface throws on your trainer to the most you can reasonably achieve, set the low rates up to what the throws used to be. If your current engine gives you unlimited vertical, it's about powerful enough. By that I mean, you can pull up to do a stall turn like manouver, but instead of ruddering over, apply throttle, and accelerate up. If you can't, it won't hover as is. Then you'd try the lowest pitch, highest diameter prop you can swing (maybe a 12 or 13 x 4 or so). This will lower your top speed, but give drastically more thrust, and hover may become possible. Also, the CG will need to be at the rearmost position you can fly'er at. Move it back a titch at a time, until it feels too sensitive, then forward a titch. Move it maybe 1/8" at a time, and avoid adding weight, it won't help the hovering.

That said, hovering and torque rolling, etc. is very difficult even with a 3d plane. It'll take alot of practice.

A good friend at my club does all this with a nexstar, and he's using the stock engine. It doesn't do it cleanly, but hover, harrier, torque roll it will. Knife edge is not really good, but can work for short periods. Alot of coupling in trainer types.

Best advice has already been given. Find a cheap 'lecky foamy, or an inexpensive profile arf to learn on, but see what your trainer will do while you rustle up the funds.

J