Music tutorial
not that I know of .. just write them questions here .. I've no exp. with Oracle tho, but MB, MBwave and MBFM, as well as general composition/arrange-techniques should do fine 
You were expecting someone to post this, weren't you? 
uh no It'a just a common misunderstanding that I used Oracle .. I couldn't even technically run it on my msx back then. And secondly, it came out in a time when I was way less interested in composing on MSX ..
I'm happy to hear that you didn't completely lost interest in MSX composing cauz I still think you have the touch 
well, MB was simply worn-out, and 640k in an opl4 does make a difference .. anyway .. back to the topic ..
IF question THEN
answer
ELSE
nothing but blahblahhere
ENDIF
ask for help ..which I can't give .. :\
But uhm, you *do* know the basic concept of a tracker, right?
Tried RTFM? I think Oracle comes with a manual, and otherwise you could always read the Moonblaster (1.4/FM/Wave) manual to get an idea. If you know 1 tracker, you know most of them
With some concrete questions we can help, of course. I think 'I want to make music, tell me how' is a bit too broad