Thanks for caring,because if I direct buy new camera ,this time I sure will ask the seller teach me step by step ,and all the function and all the button for

I really stupid on it stuff

And now this lx3 when I snap picture in night ,the people in picture also look dark
And when snap the food can't make the feel like the food is clear and colorful vibrant yummy,with the background is blur type.

But last time the seller told me can make the background blur and front object clear this effect 1 ,but now I do t know how