Hi, for 3 weeks in you're doing great but here's what I would change.
A lot of detail has been lost in the shadows, a common problem with insects in bright sunlight. A light layer of cloud is ideal for natural light shots, or a drop of fill flash (shoot in M mode, set the exposure normally and let the flash fire in auto mode and it will bring out the shadows nicely).
Shooting in raw would also help here (dunno if you did or not) as you can process the file to get something back in the shadow areas, generally if in doubt I'll over-expose slightly as my preference is for blown highlights over black shadows.
Finally, I think a different angle would have worked better - either showing the side or the back and portrait framing would help as well. A good tip for shooting animals/insects is to leave some space in the frame in the direction the subject is facing, in your shot there's lots of space to the right making the dragon look squashed over on one side.
But you're off to a good start, half the battle with bugs is getting close enough to get the shot in the first place