Sorry, it can't be done. No matter how many times you Google it, you will never learn Jiu-Jitsu that way. This is obvious to anyone who has ever set foot on the mat.
I suppose if you are a visual learner, you could figure out how to do some things by watching videos. But without a partner to practice them on, you will never learn anything. Even if you convince your mom to let you try it on her, you are still not learning Jiu-Jitsu. As all practitioners know, nothing works the same on two different people so you need to try the techniques on many.
Even if you are able to convince your entire family, and your dog, to let you practice on them, you still will not learn Jiu-Jitsu. It is not a static art. It is live, and unpredictable. It is never the same thing twice.
You can't even learn it by going to Jiu-Jitsu class...if you don't roll. The only way to learn it is by grappling. That is the only thing that can teach your body to sense and feel all of the things that are Jiu-Jitsu. And you definitely can't grapple by yourself.
However, as an alternative, you can learn how to fight like a girl by yourself...