Mark Sage said:
It's sort of a situation where I know what I want it to sound like, but I have literally no clue how it goes.
Could you clarify what you mean by this? Music is so wide open to interpretation and execution that is can be difficult to pinpoint a problem and find a solution at times. I just want to make sure any advice given is actually constructive to whatever problem you might be having.
Finale notepad isn't particularly capable of "orchestra." You get piano midi at best, so it may be difficult to achieve exactly what it is that you're looking for. If you want a program capable of orchestral playback, sometimes there are free apps or synthesizers available through stores. There are also sometimes plugins for orchestra midi packages. Otherwise you're better off upgrading in some capacity. If you aren't as worried about playback, then this isn't a problem obviously.
As for putting the music to paper or program, every one has a different method. If you have a decent idea of what it is supposed to sound like, you might be better off trying to find an instrument of some kind and hammering it out piece by piece until you know the notes more specifically, melody, harmony and all. Again, if you don't have one, there a lot of of plugins available that you should be able to find. I think garageband has some decent functionality for instance.