Take an airplane with you that you have flown many times and fly it first. Fly the wings off it and do all the things that feel comfortable to you with it. Then fly the other plane and just go through the steps slowly. Take off and fly, get some altitude and trim the model and make some smooth passes up and down the runway out in front of you. Gradually work up to a loop then a roll. Then let your instinks take over. Remember to breath all the time. As long as the model is built well, ballanced and the radio is in good working order everything will go fine. IF it makes you feel better I have been flying all types of aircraft for 40 years and from time to time I still get the first flight shakes they just don't seem to last as long.