You have to go past 10 nights, in the main menu you can find the basic stuff (i suggest using detective mode to get familiar with them).
The things you don't know how to deal with are the 2 killers in the game.
Tanner and The Kidnapper.

Tanner, the "this is awkward" guy, is probably the most annoying to deal with.
From what i've played Tanner has 3 sound clues.
Grass
if you hear grass, Taner is coming (you don't need windows open to hear the grass), flash him on the right point and he will have a cooldown, so you won't see him for some time
Footstep
if you hear 1 SINGLE, only 1 footstep inside the house, same as the grass noises check the cameras and flash him away.
Owl
If you hear the Owl, 3 things can happen
-Tanner is outside coming
-Tanner won't come
-Tanner is coming really soon
The best strat is check the camera, if you don't see him, do a report real quick and then check again,
if he's not there don't worry
Knocking at the window
-Same as Grass and Footstep, check the camera and send him away
Closet
there are 3 closet
2 in each bedroom
and 1 near the computer (the most important)
KEEP. THEM. OPEN.
if Tanner comes inside the house
you could see him lean at the end of the corridor, near the "pc closet"
you are safe if you do 2 things.
1.stay close to the corridor's wall as far as possible to the closet.
2.DON'T OPEN IT, do as he wasn't there, he will go away soon (i usually open it again when he appears on the camera again or the next night)
Jumpscare
if Tanner jumpscares you while you are checking the camera, don't worry it's only a distraction, but watch out because if he appears as jumpscare he won't be on cooldown, so he can still come right after it if you are unlucky.

he's simple, he will only appear on dark rooms, unless you have open windows.
If you see a dark room press F for the flashlight and point at the window, he could be there lockpicking, after checking
turn the light on and check the window to see if it's closed.
Before going to sleep check if ALL windows are closed and all lights are on,or else the big boy will be in your bed to "kiss your forehead".

The most efficient route i've used to win is:
Start by closing all windows (the 2 killers won't start moving unless you interact with the pc, or after a certain amount of time)
after that open all icons and begin (i suggest to use a guide to check which report are true and which are false, practice on detective mode).
Tanner can come really early but usually with a sound clue.
Every once in a while check the cameras, and everytime you catch Tanner go to check the lights AS FAST AS YOU CAN, since Tanner won't be active so no worries.
If Tanner doesn't shows up and you haven't checked the lights in a while, check them and pray to god that Tanner doesn't show or goes to the closet.
So in summary:
Do a few reports, if Tanner shows up, send him away and then check the lights
If he doesn't show up, check the lights and then the cameras if he's not in yet.
keep the loop and you should be good to go.