I like to read info files when there is one (there are only hundreds of info files vs. thousands of man pages). Many are on your computer already in /usr/share/info folder. To read them, either use M-x info inside emacs, or console app info which is part of the texinfo package, or tkinfo from the AUR. The console app will show you the man page if there is no info file.
Info files tend to be organized hierarchically and be more extensive and tutorial in nature than man pages.