Trim to what you like and are most comfortable with, I trim for full throttle for most of my planes as I prefer it that way. But most important, no matter what you trim for, you will need to make adjustments. It means that you must be in control of the plane at all times.

Like what Minn says, if its really bad on full throttle then put in some down thrust or mix with some down elevator if you wanna take the easy but not the best way out. I do that for my big Lazy Bee as she climbs a lot. Fly more and you will gain more experience. Most of all have a ball of fun!