Cool.
Try to use masking tape to get cleaner edges.
Do you start painting after fully building the model? I would suggest painting small parts before puttting together as I can see missing paint on turbine fans inside the engine bay.
Also cut long pieces of decals in half or thirds, so it's easy to handle. Looks like some of them are out of alignment.
Ya, pay attention to small things like that will dramatically improve the finish of Your model.
How old are you by the way?