You're new to scrolling, but what made you buy a scroll saw? Did you see something and think, ''I like that, I'll make one'', or did you just fancy 'having a go'?
The point here... Start off cutting something you like. That way, you will persevere with it until you're happy.
2D puzzles, fairy doors, simple automata, rubber-band guns, xmas decorations, word art... but they all use a pattern.
You're really only restricted by two things... the size/type of blade and the size/type of wood (or is that 4 things?). Yeah, the throat size of your saw is a restriction (if you let it be), but nobody starts off cutting stuff over 16''.
Also, the hardest thing to get right at first is blade tension.
Once you start making 3D intarsia like some of the guys here, then you're into a whole new league... but they still mostly use a pattern.
As stated above, Steve Good has some great free patterns on his site.
Don't start off buying expensive materials, you WILL balls it up at some point. If you can get old furniture for free, it'll yield a great source of scrolling material.
Excuse the random outpourings, some of us don't get that extra hours sleep when the clocks change. :-D