You probably want finance as much as macro. Take a master's degree (not sure if these are as common in the US as in Europe). This stuff is hard, you need to spend time on it. Failing that, follow the advice of lesswrong and read textbooks.
Textbooks won't tell you about Brent Johnson's Dollar Milkshake theory. They also won't have insight on todays inflation and whether it's more similar to the 1970s or 1940s.
Textbooks are great for finance fundamentals, but shouldn't be the sole source of macro.