RE: First solo flight !
Congrats! Now, though, your real training begins. Keep up doing the touch-and-go's, landing practice, TAKE OFF practice (everyone seems to just practice landing but taxi and take off straight is a part of it and can be an important part of your post solo training) and do some practice dead-sticks. Go high, try to go downwind somewhere but not to far away, and just pull the throttle to idle and get it into a good landing approach position, glide to about 2 to 3 meters above ground then go to full throttle and to it again, this time from a different position, perhaps upwind. Get used to that and you will be in a good position to save that aircraft should the engine go dead-stick on you.
Again, congratulations on your Solo, I know the feeling!!! BUT keep up the training.
DS.