In order to be able to create music that sounds good or ‘right’ (regardless of the genre), you need to learn the basics of music theory: notes, scales and chords. Personally, I’m not qualified for teaching you even the basics as I have a big gap in knowledge in music theory.
Fortunately, there’s guys like Nelson Fernandez Jr. from Warbeats (Warbeats is an FL Studio community with a lot of tutorials), who have put down the basics to an easy to understand series of video tutorials.
Watch these videos, and you’ll most likely get a grasp of the idea!
First, the notes:
Second, the scales:
And for some additional material, check the tutorial for chord progression:
Making a melody:
Chord inversion and the epic chord progression:
Making a song in key:
Make effective basslines:
Making musical phrases:
Watch these tutorials with a thought and you should have a strong idea of how to make your music sound right!