In any buffer C-z (control + Z) temporarily disables evil-mode in that buffer. C-z again brings it back.

For a more permanent solution: go to $DOOMDIR/init.el, find the line that says (evil +everywhere), comment it out (add a semicolon in front). Then doom sync

Emacs has a built in tutorials to help with basic movement/editing, and C-h k (that’s control + H then K) tells you what any key does.