HEY Jack.... assuming you are serious.... bottom line: we are all in this boat together. We all think we have talent, we all think we have to potential to make good music otherwise we wouldn't be here.
Just start. If you are going to try mostly audio (playing guitar, singing, or any other instrument) buy a standalone recorder like the ZOOM R-8. Then record some stuff and see how it sounds coming INTO your ears as opposed to inside your head.
If you are going to record strings, orchestral instruments, organ/piano, synths etc... get Music Creator or some other cheap DAW maybe R3aper <3=e>), a small keyboard MIDI controller, and the cheapest interface that has latency you can live with (although direct monitoring will solve the latency problem if you are doing one track at a time (I think)).
Jump in there without spending a lot of money and see if this is what you imagine it is. If you like it and what you hear, then invest in good monitors, a full featured DAW, a good interface, and a better controller but be forewarned... it is like buying a boat to fix up, it never ends... at least not until you have a lot of experience and confidence. (A fixer up boat is referred to as a hole in the water you throw money into).
So... just figure out... audio or MIDI. Get into it as cheaply as possible and record your ideas, even if you have to do a rough demo. Then you can pay someone who is proficient with audio or MIDI a nominal fee to rework it into something more than your basic idea. Then you can listen to it OUTSIDE of your head. Believe me, it makes a huge difference.... BUT, there is nothing wrong with you or your dreams. I think you are being a bit unrealistic but that, I think, is only because you don't yet know what all is involved as far as skill and equipment and experience.
Only when you get a rough draft, so to speak, that you can listen to and ask others to listen to it (be careful who youu ask because some people will not listen to the music, they will hear the lack of polish and say things that might hurt you)... will you have any real idea of what you have and, what you need, the direction you need to take, and how long the road might be.
Now... having said all that. If YOU love your music... that is enough reason, the only reason actually, for you to pursue it but if you do pursue it... pursue it wit a passion knowing that you will endure rejection and other hurtful things because your music will be a part of your heart. Learn to ignore the hurtful and mean spirited comments and embrace the constructive criticism. You'll need a thick skin and a true love for your music AND you will need to put a LOT of time (and a bit of money, it isn't nearly as expensive as it was even 10 years ago) into it.
Research before you buy... read a lot, ask questions and explain that you are trying to learn. People here are helpful and there are other places that are helpful.
I'd recommend you to read the "why do your recordings sound like a55" thread on the Cockos forum. It is good for a beginner and for anyone. I will try to insert a link, if it does not work I will PM it to you. Link: (it is a LONG thread but worth reading, it will save you time and money)
http://forum.cockos.com/showthread.php?s=a14e2b4f475adf5a45876330893d7d4a&t=29283&page=18 Julien