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C-h t means to depress the control key and hold it down, and while holding it down press the letter h one time; then, release both of those keys and press the letter t one time.
The command is help-with-tutorial. P.S. I think you'd be much happier in the long run if you don't do things like "bind C-h to different backspace control". Why exactly do you want to do that?
To ascertain the default keybinding for a particular function, start Emacs without any user configuration; aka emacs -Q and then type C-h k and then the keyboard shortcut at issue -- this will open up a *Help* buffer that describes the function to which the keyboard shortcut is bound.
C-h tmeans to depress thecontrolkey and hold it down, and while holding it down press the letterhone time; then, release both of those keys and press the lettertone time.M-x tutorialor something fundamental.help-with-tutorial. P.S. I think you'd be much happier in the long run if you don't do things like "bindC-hto different backspace control". Why exactly do you want to do that?C-i C-jfor up and down navigation butC-iis something important it seems, so I useC-l C-jemacs -Qand then typeC-h kand then the keyboard shortcut at issue -- this will open up a*Help*buffer that describes the function to which the keyboard shortcut is bound.