Pic 1 looks good, but lacking sharpness. Can be improve in PP

Pic 2 and 3 - don't see any point of interest, composition needs to be improve.
add lang nako gamay
1. Know your camera more - Like you said you know the "cheche boreche" of the cam. But have you understand the settings?
2. Composition is the key of a good Photo
3. Know the technicalities like ISO, Shutter, aperture and etc. Like all camera's they have limitations. Use this to your advantage.
4. Photoshop are very common and murag mas daghan tutorials in the net.
5. Remember pixels are free so keep on shooting
Kombate!!!