Reducing Noises (I tried everything i found in the Forum)

Hello, I’m a 16 years old beginner in Blender and i want to share something with you and ask you how can i reduce Noises i tried many solutions in the forum but it doesn’t work ( I can’t do GPU renders because i have Intel HD graphics 4000, i have 8 go ram and core i5 2.4Ghz) If anyone have any idea for me.