(failed) #Learn Macro

Below are some macro photos. It is said still learning so many imperfections. A lot of noice in these photos. I think there are two possibilities, first: at that time was cloudy and raining, second: I have not smart to focus the lens.
Hoping to get guidance. What should I do if the light is less when taking photos?

bapak pocung

bee

bug

semut

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