Hi,
All of our layers use a default initialization that is the most commonly used in the literature. You can see in the doc 3 what is the default initialization.
If you want to change the default initialization, you can use the nn.init module’s functions to change the weights of your modules after creating them. There is no hard rule how to do this. You can simply update the .weight after you create it. Or do whatever feels best for your use case.