Based on what you are writing I would probably recommend a regular theme. It’s a much simpler way to get started and many folks do not need all the additional design features offered by Foundry and Foundation. Of the two I prefer Foundry because it just suits my design needs best, and works “simpler” for me. The bottom line: both are very useful frameworks, but both likely aren’t what you need at this point.
Unfortunately the built-in themes that come with RW are quite limited. A theme that can look barebones but is fantastically flexible (kind of half-way between RW default themes being too simple and the Foundry/Foundation themes being too complex but uber-flexible) is called Volcano. There are other good themes, but at least Volcano is a great starting point:
As for bringing Blogger into your website directly: that may be tricky. There certainly used to be ways to do this, but I don’t know if they exist anymore. Blogger is kind of like 1997 in web design years and so many people have left it. The result is there is a great deal of developer-incentive to work on ways to smoothly incorporate Blogger. One product that did this well was called RapidBlog but I’m not sure it’s still under active development.