If you want to say someone can learn something from the comfort of their own home:
* Understand it in your own home.
* Learn it from the comfort of your own home.
* Study it at home.
If you want to say someone can understand something better in their own home:
* Understand it better at home.
* Make more sense of it at home.
* Gain a better understanding of it in your own environment.
If you want to say someone can understand something by themselves:
* Understand it on your own.
* Figure it out yourself.
Please provide more context so I can give you a more accurate answer.