Spammer!!!
Somebody take care of this please!!!
finally found a free app to view and author music scores:
Hi guys, if you have a midi keyboard, Synthesia might be something for you.
it is a free guitar-hero like game that uses midi files as songs, however, it might really help your playing techniques. it won’t learn you to read sheet music, but it will get your fingers moving 
interesting .. the learning pack seems to also try to teach you sheet music ..
Being a piano/theory teacher, I find the best way to learn to play is to find a teacher. A half hour of private lessons may save you several weeks of self-study. It’s difficult to build proper piano chops without knowing what it is you need to do.
The difficult part is finding a teacher who understands what your needs are as a dj/producer. It took me several years to develop a successful method with the dj/producer in mind. And remember, for the most part YOU PAY FOR WHAT YOU GET.
You’ll probably learn a lot more from a teacher who charges $20 a half hour than from a teacher who charges $5. There are stories of self-taught musicians who are incredibly awesome performers but how of them are there in this world? Save yourself the time and find yourself a qualified teacher.
With regards to picking the proper instrument, it all depends on what you want to do and what your budget is. If you want to build up chops to play an acoustic piano, then semi weighted keys are not for you. I’d try to look for a proper digital piano. I’d recommend picking up a used digital piano. Usually parents sell them after their kid quits the piano and they’re mostly in good condition. I bought a fully weighted roland digital piano for $450 for a student of mine just a few weeks back.
Using controllers are good options as well such as the Akai MPK88 (ooodles of knobs, pads and faders but pricey) or a Yamaha KX8 ($359ish). The KX8 has awesome actions for the price and offers a few knobs and buttons. The keystation pro88 is another option but I hate the feel of the keys.
But above everything else, proper practice is what will make you better. If you want to learn to read music, I’d find scores from IMSLP: Free Sheet Music PDF Download. Pick up a few theory books from the library and start reading! I find that Erster Wiener Lehrmeister im Pianoforte-Spiel, Op.599 (Czerny, Carl) - IMSLP helps the student to familiarize themselves with using all five fingers.
Hope this helps. PM if you have further questions.
And also just a bit of shameless self-promotion. I teach in the east end of Toronto and specialize in teaching adults and the musician. If anyone is interested, pm me.
Best of luck!