LibreOffice on an old HP laptop I got for free, still running win10 because I can’t be assed to change OS on the half-dead creature. It’s currently the home of two on-going projects and one that I will go back to whenever these two are done, or at least done telling me their stories for the time.
My only real advice is the one everyone should have heard by now: Just write something. It doesn’t have to be good, it doesn’t have even have to have a greater context. Exercise your creativity. Get comfortable with it.
xiao