This is all correct except that financial accounting deals with external reporting and managerial accounting deals with internal reporting. But the distinction between bookkeeping and accounting is spot on IMO.

Thanks. In my understanding, managerial 101 more or less starts where financial 101 leaves off. Does that sound right?

Pretty much, yeah. Managerial 101 builds on introductory financial reporting. The biggest difference between them are the intended users. While financial accounting is all about accurately stating your financial position for tax authorities, capital markets, banks, and other potential users, managerial accounting is internal. It's for managers and decision makers to give them the most accurate information possible. Because of this, there is no consistent standard used in managerial accounting like there is in financial accounting (GAAP or IFRS), but its largely similar I believe between different companies.

Bookkeeping is tactical and low-level while accounting is strategic and higher-level. A lot of the strategic possibilities come about because of the many ambiguities and options in tax areas, and because the "best" decision for a given question has to do with so many variables.