Making music for the demo?

I'm trying to make my demo, and while I can play guitar and piano and do acoustic versions of some of my songs, I have to make contemporary music for some. I have the music all worked out in my head, but I need software that can help end my music. I wish it were free, but I'm willing to pay for easy to use music studio application. I need it easy, please and thank you. No or useless rude comments like "I do not know, you look up." please! PS: I write a rock and some country songs

Try downloading a FL Studio demo

Beat Making (Mixing Hardware & Software)