I really like the drum bead you have. I think you really have the percussive aspects of music down. Mixcraft sounds familiar but I can't put my finger on it. Before you purchase Mixcraft, I would recommend checking out some of the other software like Fl Studio, Logic, or even Sibelius. Personally, Sibelius is my preferred software since it's the one I'm the most familiar with. I've messed around with a couple like Fl Studio and it's a perfectly fine software. I haven't used Logic myself but I know of a couple of people who use it. A good place to start with music composition is learning harmonic theory and chord progressions. If you were to look at my songs you'll hear a vivid chord progression. A very summed-up version of the whole chord thing is that the notes in the melody will not clash as long as the notes that are being played is in the chords that the harmony is using. There are heaps of good youtube videos explaining the topic better than I ever could. Anyway, good luck with you music career friend!