Before going to Warbirds right after your trainer, go with a good low wing second plane. If you have your heart set on a warbird, go with the Hanger 9 PTS ARF. It`s cheap and not a bad plane. Leave the Gizmos off of it and you`ll find yourself with a handful.. But it won`t be the plane a 4* or Tiger II or several other, of the great second plane made.
Have you set your throws up and set your CG back on your trainer ? If not, give it a go, you may find there is plenty of life in the ole trainer, you`ve missed.
Her`s a pic of my 4* , I would never have been able to fly the one hanging on the wall with the bent wing , without it