[linux-audio-user] music notation

hello im new to this list, how this is the first time let me introduce myself, im 23 years computer graphic fan and also a music fan, i live in brazil and have one kid and a woman that i love, if someone wants to know more about me you can visit my messed site www.greboide.dahora.net (im still getting the hangs on web producing but im not too much worried about it now). Now im not a musician and this is a skill that i dont know if i can get one day, for now im looking for some info on making midi scores to composite together with my 3d videos that i do using blender. I would really aprecciate if someone could give me some directions on learning these things, first im considering buying a midi keyboard that i consider will make it more dynamic than using the virtual keyboard or a notation editor like the one at rosegarden. i have a relative good system here to make this and most apps are running and i already made some sound/music but nothing that worth it, the apps that i got running and think that can be usefull are theses: jackd ardour xjadeo(for video synchronized playback) jack-rack and ladspa plugins zynaddsubfx jack-dssi-host (fluidsynth,xsynth and hexter) clavier and vkboard freewheeling hydrogen rosegarden perhaps there is more but i think that these ones are enough for now otherwise it can get too much complicated. so my general question is where can i find composing infos like tutorials or whatever but the most important to me is make my own music or perhaps make a partnership with one but i would really like to be able to compound it, thanks for those who can give me some directions.