You can also trial Finale’s other music notation software. I happen to like PrintMusic- it has a nice scan feature. Simply scan your sheet music and edit it on your computer. The only drawback I have found to it thus far is it has a hard time scanning hand-written scores.
I’ve been a Sibelius user since version 1.2 and strongly recommend that you check out this program. They now have a similar lower-cost version with fewer features, but the same user-friendly interface. I tried using Finale before Sibelius came out and never felt comfortable with it, and I’ve used some serious MIDI software since the beginning of the Mac in ’84.