You are honestly at the point right now where you are SO fresh that I don't even wanna start explaining things. You're asking questions that, once you start messing around with the daw, will become very obvious.
Im assuming you've never even seen the layout of a DAW before? You'll see what I mean by it doesnt matter which 'instrument' you want to play, the data translates to them all within your daw. You just need to select your sample.
Right now your first step is just go start doing some research on different DAWs and figure out which one you want. Don't put too much time into the decision, just get started with one researching then have your first demo downloaded ASAP so you can start trying. trying Demos are free.
Once you download a daw watch some basic tutorials on it so learn your way around its interface. Then start learning about how to understand music theory, notes, song arrangement, learning an instrument like I said will help HUGE, etc..The paths you could take after choosing your DAW are endless so worry about that later.
But in short terms your steps starting from now are
1.)Pick A Daw and get the demo
2.)Learn its interface
3.)Try making music on it until you realize that its not that easy
4.)Figure out your own path of learning how to do it, options are endless beyond this point. The next few months after this point will be overwhelming with the amount of stuff you need to learn. If its not overwhelming, something is wrong with your research.
