First you have to learn the basics before you can learn fly. It's like a baby learning to walk you have to crawl first. It seems from what you are telling us is that your instructor didn't take much time in teaching you how to fly properly because if he did then you would know that you are just making a straight normal climb out.

There is really no big secret to taking off. You advance the throttle to get the model moving the advance the throttle smoothly until you have reached full power. By that time you probably have more than enough speed to take off so just add elevator pressure just enough to raise the nose. The plane will probably leap off the ground as you will have excessive ?Zoom Speed" Then just hold that little bit of elevator pressure until you reach a safe altitude before making your turn 75' - 100'.