Referring user guide
Are you press ligthly? if press half and ligthly, it will not take the picture.
When you have using macro mode, you need to disable Flash mode.macro mode will show picture(flower) and avoid hand shake during this mode.
When you take in 10cm range in macro mode, it will take more longer time to autofoucus, you need to be freeze a while until it take the picture. The best it, try to take picture in without you inhale. it will avoid you from shage
Try using in different DIS mode when you using the flash.
In some mode, it will have twice flash. First flash it will check the condition and wait until second flash and dont move your camera.
Some condition, you will get the picture is white, it because from dust atmhospheric that we cant see. it reflective to ur flash.for the best picture, you need to try in different mode and different condition. that will make you as proffesional. this camera have many mode that you need to understand. training urself to be perfect. download manual and test your camera