Try Metasequoia.
It's used by most MMD model makers and I like the flow. When I used to make models and such, that's what I used.
Texturing usually requires knowledge of UV maps. Bones and physics can be done in the PMD editor. Most tutorials can be found on dA.
As an MMD veteran, I can say that 3D Modeling is not easy, at all. Work with editing models first, looking and studying the vertices and polygons and typical 3D model topography.