1. Yes! I have a book from 1898 on Greek Grammar that I purchased at some estate sale sitting on my desk and I have this place on reddit bookmarked:

http://www.reddit.com/r/IntroAncientGreek/?count=75&afte...

I know all the alphabet and the first declension already for nouns (And thanks to my failed Latin studies, I think I know exactly how they work), as well as the pronunciations and a couple of words. Today I plan on going all the way to Lesson VII on reddit (and more, if time will allow) and whatever amount of pages on the Greek grammar book.

I also have Anki, a spaced-repetition flashcard program aiding me in memorizing the words! I'm already firing on all cylinders!

2. Thankfully I already know how to read music pretty well as I have some minor experience playing the flute and trumpet (Which I hope to pick up both again one day as well). The hardest part is getting my fingers to play with that smoothness that you see when other people play the piano... As a beginner, how they just dance along the keys and manage to make everything sound beautiful just looks impossible.

3. You should! It's actually easy once you get the routine down and get past the initial hurt. Actually I was planning on adding sit-ups as well, but imo those are much easier. I was able to do 100 of those once and am content with doing about 20 to 50 crunches however many times I want.

4. I can't help but be optimistic. I try being depressed, but after a few days I just stop and go back to being optimistic, even when I should still be legitimately depressed. It must be in my nature, I guess; I'm sure I can do it!