Oh, installing a switch is quite easy indeed. Remember that for your setup, it's mandatory to cut off the electricity on your house before attempting any of these steps.
Here is a video on how to install the switch:https://www.youtube.com/watch?v=vb0m36gwf1c
In the video they have three cable, one black, one white and one green. They only connect the black wire into the switch.
Well, from your purpose, you can use or the Blue cable or the Brown cable. The only cable that you cannot use is the Yellow-Green cable, because this one is the earth. Remember, only connect ONE cable in the switch, or the Blue one, or the Brown one.
With the switch installed, all you have to do is configure the dimming effect to be 100% on.
Let me know if this was enough.
Oh, I almost forgot, you can buy any two-terminal switch you want in any consumer electronics store.