Would like to brush up on the newest technology, not your advice on my place in the work field. I would like a web site that shows step by step troubleshooting techniques. I challenge you.!! thank-you.

Someone had hit my grams 99 Ford Escort in a parking lot and her drivers side power mirror is hanging off. It needs to be replaced can someone please tell me how to replace it for her? Please tell me step by step on how to do it (I need the “dummy” version please for I’ve never done it before). Thanks sooo much in advance….