Captain Marvel made his premier in Whiz Comics #2 in February of 1940. He starred in Whiz Comics up until the final issue published in June of 1953.
Captain Marvel Adventures premiered in March of 1941 and issued it's final comic in November 1953.
There was a fundamental difference between Whiz Comics and Captain Marvel Adventures. In Whiz Comics, there was typically just one Captain Marvel story followed by stories featuring other heroes such as The Golden Arrow and Ibis the Invincible. In Captain Marvel Adventures, there were typically four stories all featuring Captain Marvel. Now if I was a kid in the '40s and '50s I'd probably put my money down on Captain Marvel Adventures and get more stories for my money!
If you've never read any of these comics, don't despair! I've found two sites where you can read both Whiz Comics and Captain Marvel Adventures - free! The two sites are Comic Book Plus and The Digital Comic Museum.
Whiz Comics and Captain Marvel Adventures provide us with over 300 stories and adventures of Captain Marvel. Holy Moley that's a lot of adventures!! My plan is to feature an issue of either Whiz Comics or Captain Marvel Adventures each week giving an overview of the issue. In the mean time I hope you check out a few issues for yourself!!