How do I use anything other than default values when converting bundles to required components?

[slate snow]

The docs for Component describe exactly what you need: https://docs.rs/bevy/latest/bevy/ecs/component/trait.Component.html

And also what you're currently doing is having a component that internally has velocity, mesh and material, that's very different from having those components on the entity itself. I side the Player struct they're just data