Before you make a post: Yes, I know Moonlight sonata in general is overplayed, and it probably has an infamous reputation amongst pro level pianist, this means nothing to me, I may not be able to play piano very well, but I know enough to know that Moonlight sonata 1st and 3rd movements are probably going to remain somewhere near the top of my favorites list no matter what, another piece which I discovered trough listening that I like alot is Scriabin's (Did I spell that right?) Etude in D# Minor Op.12, I know it's an etude, but I've never heard music like this before, same goes for all his music, he owns. period.
To the point, I have listened to ms1 and ms3, as well as ms2 (really just think no.2 throws of the ambiance of 1 and 3, and I have realized, that ms1 alone, is a large feat, the finger technique required is no big deal, it's the parts where I have to make the pinky sound like a 3rd voice, and the tone alone is insane to control. (my maximum "comfortable" Stretch is an 8th.

, though, I can reach a 9th without to much problems, and if I spread like hell I can reach a 10th, but the rest of my hand is hanging from the fallboard.) then I personally looked at the 3rd movement, I just don't know if I can ever do something like that...
I'm 18 years old now. I have been playing for 2 months, I'm struggling to put money together for a mere 800$ digital piano, I have been doing this for years. The only thing I can do as of right now, is use my casio keyboard (No velocity touch

) to memorize the fingerings of scales and arpeggios, (and chords, which I have no knowledge of how to practice those) and even then, I can't even practice these scales and chords, and arpeggios simply because of my keyboard, which dosn't even have weighted keys.
As you can see, I'm in a terrible situation, I have absolutely no knowledge of how to get an acoustic piano that will work, and playing on the finest digital pianos is still conter productive, Keep in mind, my age, and the fact that I desire how to learn these 2 pieces, and master them, I want to be able to play moonlight, this song has been one of my favorites since I was about 4-5 years old, and it has a special place in my heart. the 3rd movement to me seems to represent some crazy reclusive scientist frustrated.

I love it's energy.
I have played several pieces already, making sure I don't actually learn anything that much, simply finger positions, etc, and to get a simple general idea of what I'll be up against, I know it will be hard work, and I don't doubt myself, but I know, that I, as a human being, have limitations set on me, expecially in this particular age range, and I want to know from you guys, because I know you know, you are in musical enviroments all the time, you around legendarie pianist all the time, you must know if someone this old can pull it off, I have pretty high hopes, because these two pieces really aren't so difficult in comparison to some other pieces, so yeah.
Can you guys also just help me get started on general ideas I should try to do?
I'm more than willing to get lessons, but I really don't want to do that unless I have a acoustic piano, and even then, I want the teacher to know what I want to do. All help is greatly appreciated, sorry I posted such a long post. I'm on the verge of insanity.