If you have a computer, you can make music. And it won't cost you anything.
You can use this free DAW (Digital Audio Workstation), Tracktion 5.
You can use these free instruments from all over the net, Free Instrument list.
You can use the free instruments I've made using Maize Sampler.
But you don't need a new blog to learn that. The purpose of this blog is to slowly create an instrument by instrument collection of standalone VSTs covering both the orchestra and the band. We will start with the queen of the orchestra, the violin and over time (probably a long time) work through strings, brass, woodwinds and percussion before moving on to the rock band instruments. Eventually we will hopefully have several decent versions of every major western instrument and you can use them to make most any kind of music you desire.