First launch CS:GO,
Then go to "Settings Menu",
After that press "Game",
Then you should see "Enable Developer Console (~)",
Click on it and switch it to "YES",
After that press ~ to test if it works, if it does, then your finished!

To make footsteps louder in CS:GO you have to:
First Launch CS:GO,
Then press ~ and open console,
After that paste:
---------------------------------------------------
Snd_headphone_pan_exponent 2;
Snd_front_headphone_position 45.0;
Snd_rear_headphone_position 135;
Snd_mixahead 0.05.
---------------------------------------------------

Then you should be done!

To remove blood and bullet marks you have to:
First launch CS:GO
Then open console (~)

And paste this in:
---------------------------------------------------
bind "shift" "+speed;r_cleardecals";
bind "w" "+forward;r_cleardecals";
bind "a" "+moveleft;r_cleardecals";
bind "d" "+moveright;r_cleardecals";
bind "s" "+back;r_cleardecals";
bind "MOUSE1" "+attack;r_cleardecals";
bind "TAB" "+score;r_cleardecals"
---------------------------------------------------

After that you should be done!

This section shows how to boost your CS:GO's FPS:
First open Steam,
Then right click on CS:GO and press Properties,
Find "SET LAUNCH OPTIONS" and press it,

Paste these in: (without after the // and spaces)
--------------------------------------------------------------------
-novid //Disables the game's intro screen saver.

-high //Starts the game with a high priority.

-threads <number of cores/threads> //The number of processor cores that the game can use.

-nod3d9ex //Reduces memory consumption and speeds up switching between windows (alt+tab)

-noaafonts //Removes font smoothing.

-no joy //Removes gamepad/joystick support.
--------------------------------------------------------------------

After that you should be done!

How to control spray in CS:GO:



After that you should be done!

How to get a better trust factor score in CS:GO

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1. Use Steam Guard.
2. Make your profile public.
3. Become an active member of the Steam Community.
4. Play games often without cheating.
5. Get praise (commended) by your teammates.
6. Do not kick anyone out of the game.
7. Do not block your teammates and do not harm your teammate in the game.
8. Do more OVERWATCH cases. (if enabled)
9. Like guides like this.
10. Add more friends.
11. Comment on many different profiles, discussions and guides like this one.
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If you would like, can you award.

I hope this helped you and have a good journey in CS:GO.
<3