Gonna have disagree with you here. There are many musicians that have gotten plenty of attention with just a DAW and a Laptop. @Dj alicorn, it is possible to get good at music with not so much money. I want you to understand that as long as you enjoy music and want to make music for others, then you have all that you need. Music maker jam is a bit insufficient tho. I know you're 16, but try to save up some money for a cheap lil computer and get a DAW. It'll be worth every penny you save up. You don't need any keyboards, instruments, and fancy equipment to get good. I promise you that time, practice, and passion is all you need. Over time get the rest of the equipment that enlightens you.
(I just read that you got a computer, so you're all set! just have fun now! )