PLEASE NOTE: This is my guide on how to get your steam ID. Please be sure to site the source of the pictures if you take them.This is a guide on how to get your steam ID. I added pictures to make it easier.
IF YOU HAVE ALREADY ENABLED CONSOLE, SKIP TO STEP 51) Click on Options
2) Click on Keyboard

3) Click on Advanced
4) Click on "Enable Developer's Console"

5) Access any server, it doesn't matter.
6) Open your console by pressing your (~) button. If you have trouble finding it, it is below the escape button. If you can't find it, you're out of luck. Just rebind it to another key at this point.
7) Type Status in your console. These results should come up.

8] Now copy your steam ID
9) You have successfully acquired your steam ID, now you can post your application.
10) Your steam ID looks like the following: STEAM_0:x:xxxxxxx