Not bad for first time - and very hard conditions for sure. Some of the in-flight poses on the birds came out pretty good. You could probably improve those a bit with some post processing to bring up the shadows a bit for some more details on the birds.
In general, there isn't too much one can do to get both highlights and shadows perfect when shooting into the sun like that - there basically has to be a compromise as it's beyond the capability of a camera. You're either going to expose for the birds, and get a blown out background, or expose for the background and get silhouetted birds. You have to try to find that middle ground as best as you can. In post processing, you can recover a bit - even more if shooting RAW - if you're willing to put the work and time in. When recovering blown highlights, you're pretty limited with jpg files, but raw files will give you some room. When recovering shadows, you can do much better with both raw and jpg, but you also tend to get noise and grain as you boost the shadows lighter.
As for shooting, if you're not real instinctive or skilled with manual settings changes, you can get by shooting in P, S, or A mode with autofocus...a few settings on the camera may make things a little better. I'd recommend setting focus AND metering modes to 'center-weighted' or spot...that way the camera will try to meter to favor the subject in the crosshairs. When shooting 'action' shots, S priority, or a sports mode that keeps shutter speed selection above 1/500, would be best. You need 1/500 or so at the minimum, and preferably 1/1000 or faster to freeze fast-moving action.
When it comes down to it though, the best contributor to your photos would be avoiding those shooting conditions of shooting into the sun or mid-to-late day harsh sunlight! Try moving your angle if possible, try different times of day, especially morning and late afternoon - the light is softer and warmer and the shadows are cast in a more dimensional and dramatic way.