haha no problem at all. umm well I've been drawing on the computer for 8 years or so. and I've had photoshop since then. but with sai I don't have that much experience yet.
It takes a while to get used to a program, but the most important thing is to learn how to draw well digitally without depending too much of the program, if that makes sense..
The thing is to learn the basics so you can draw in almost any program available! Which is why I use limiting programs like paintchat and tegaki etc. they are limiting programs, and hard to use, but they teach you a lot!
I hope I answered your question haha