If you throw it, you will probably break it. I have seen more new gliders being thrown to trim get broken because they go straight up, stall and come straight down.

It would really help to find someone to help you. If you can not, find a long shallow hill to throw it from. Don't throw it too hard, just straight away. Make sure it is ballenced first. I fly that plane, the build up version, not the ARF, but they are the same basically. It will tip stall if you slow it down. It will not take much of a crash so you want to be easy with it. If there is a little wind coming up the hill, it will glide better, but don't turn back to the hill with the wind at the tail. It can stall fast that way. Don't ever fly with wind down the hill. If no hill, a winch launch would be the best, but with someone that can help you trim it and everything. Lots can go wrong. If you just chuck it on a histart and stall it, it drags it till the cord is all in and pieces are scattered forever.

As I stated, find help if you can. It is easier to find someone than to keep fixing it. If not, start on a hill with no obstructions. It will be worth it. Your field would be ok for a histart later, but not at first. Throwing it to test it will just break it, and throwing it hard to get high enough to do anything is impossible. The pros can do it, but a beginner can't. You WILL break it if you try.

Hope that helps some.