I'm not using helix for a long time, but I can suggest you to just look at configuration docs and see what you would like to change. Most of defaults are very nice in helix, but sometimes you might want to add something.

EDIT: Also install LSPs, if you haven't already.

For basic usage (similar as vimtutor): hx --tutor

For the other stuff, as already said, the docs should be rather thorough, the wiki may also be a starting point