How do you build ultrastar songs?

I've been using ultrastar for ages but I'm unsure on how to make a song
Do you guys use a particular program for it or do you just use notepad and do trial and error?
potential songwriter here! ^^

Hi !!
please go go read this part:
https://usasian.forumotion.net/f36-songmaker-help-section

and this:
https://usasian.forumotion.net/f9-tutorials

you find all tutorial and questions for make a song

good luck !
if you have a problem,
we are here

babye !

PS: i move your answer in "question" part of forum :p