It's been a long time since I'd looked at this, and now that I know a bit more about music production, this is still a solid intro to making beats or electronic music.
I wish it let you at least load a handful of kit samples so you could make something sound a little more like the genre of music you like, but things like this show that making music isn't hard. Making good music is hard, but making music for yourself to enjoy, use as a form a therapy, or as a way to learn new things, is easy.
It's just a process of learning to arrange little pieces into bigger patterns that catch and hold your attention. It's the same as when you learned to speak, from saying mama to being fluent. You're still using the same alphabet, but you can use it to let people know what you are feeling.
If you enjoy this, you can try an app like Caustic or Koala Sampler, or buy a decent used instrument. Also, the sooner you make music with others, the faster you will progress because you can learn from their successes and mistakes and it helps branch out your ideas