This article is about a procedure for creating charts.
You need to edit a song if its length is too long or it starts too fast.
You can also learn BPM and beats on this page.
After creating a chart, upload it to SweetPotato server and try it on Sonolus.
If you satisfied with your work, then publish it.
Using a plugin, you can check how your chart looks like without try playing it.
You might be able to discover mistakes of your charts.