Thanks, but nah, the problem isn't dissonance. The sounds sound consonant but they just don't compliment each other. Instead
of fitting together like in good songs they just sound seem to fight for the attention of the listener.
It will take you much hard work and a lot of time to make something good, something other people would like to listen to.
(Just sayin, I know a lot of people who gave up because it was too much work.)
You'll need a program to make music, a DAW (stands for Digital Audio Workstation). FL Studio/ Fruity Loops, Ableton Live and Logic are some famous ones but there are more and it all comes down to what feels the most comfortable to you. Just google for some DAWs, download a few demos and mess around with em.
Go on Youtube and search for tutorials on how to use your DAW and make songs, that helped me a lot .
Also go to the My Little Remix,a forum for brony musicians. There are great guys over there who'll help you if you have trouble with making music. Please use the search function there though, before making a "new-to-music-how-do" thread there. There are more then enough of these on mlr