Help with pitch training?

I listened to the beginner recordings here on size and weight.

https://selenearchive.github.io/

I found my default pitch is about C3. I think I need to raise my default pitch but I can't seem to find pitch training on selene archive. What does pitch training look like?

Do I just speak in my regular voice consciously at a higher pitch for like a month? Will that turn my default pitch up?