hi mister
why you don't just edit the settings of the 'default paragraph style'?
for files created in the future you may define some of the settings (like 'font', 'text size', 'text color', 'first line offset') in 'preferences' → 'item tools' → 'text' unfortunately you can't define a full paragraph style here. but if you need the same settings in different files, you should create a file with all the styles, colors, master pages, e.t.c. and save it as a template…
utnik