I pretty much agree with the prior posts that you should have a plane in between your trainer and the Extra 300. I have flown quite a few of these scale like aerobats including the extra 300. They are pretty stable in the air but they are so responsive they will get ahead of a beginner quickly and you have to land a little faster than a trainer to keep from tip stalling the main wing. What you need is a plane to transition you from your trainer. I suggest looking at a plane similar to the sig fourstar or H9 Advanced 40. I went with the sig fourstar 40 for my second plane and loved it. It taught me how to build a kit and how to handle a taildragger. This plane is considered by many to be the best second plane made. It is very easy to build and has exceptional high and low speed flight characteristics. It is also quite maeuverable and fast with a BB .46 engine. This plane will prepare you to be able to handle planes like the extra 300.