really need step by step on how to edit a video taken on my phone,

Hi,  I really need advice on how to edit my video clips that I take with my phone. 

I am finding it very challenging and it is clear that there are things I am failing to understand,  so really need a step by step instructions on how to do a lot of various things with MS Movie Maker, 

some things are

 how to take off sounds from the video and how to put a narration on it, 

how to remove bits out that are either out of focus, un necessary etc and how to join them up so that they play smoothly

there are probably other things but these are the most pressing.

Reason to learn this is so that I can post videos on facebook so that my daughter who has had to move to Canada with her husband can see what is happening here at home.

Thanking anyone who can give me some advice,  even links to tutorials or something will be a great help,