For info on copyrights:
http://www.copyright.gov/
If you have a CD with you songs, you can use Form SR which is available as a PDF from the copyright Website above. Under the Nature of Authorship section, you can state what you are the owner of: sound recordings, music, lyrics, etc. Filing this form costs $45. No need to create lead sheets.
The forms can be found here:
http://www.copyright.gov/forms/
A resource for indie music, try the Indie Bible:
http://www.amazon.com/Indie-Bible-7..._bbs_sr_1/103-4443702-4916624?ie=UTF8&s=books
Personally, I would build up your engineering knowledge and skill, save up for some decent gear (doesn't necessarily have to be high-end), and really work at the production quality of your music. I'm not really interested in being tied to a record label myself, but did have those dreams not long ago. I actually went to Nashville back in the mid 90's when I wrote and recorded Christian pop music, and called the major Christian labels from a payphone! One label said "sure, stop in and drop your demo tape off". I sped over there like bullet, walked through the door, and dropped my tape in a bin by the receptionists desk. A month later, I received a photocopied form letter letting me know that they were not accepting unsolicited artists at that time. But hey, I did it. This wasn't indie level, but I don't recall knowing much about the indies at that time, so I reached for the stars.
Now I focus on writing the best music I can, production quality, and do all my own recording. I saved, and spent quite a bit money on gear (you don't have to spend thousands necessarily, but I started budget and have worked my way up), and have learned how to use it all over the past few years. I'm not worried about getting on board with a label right now, I'm ready to get a new CD done and start playing local coffee houses, whatever to get it out there. The Internet has become a wonderful tool for selling music as well - either CD's all wrapped up and bar coded to be sold at CD Baby, Amazon, etc. or digital downloads.
Good luck to you! Follow your dreams, but don't have expectations from the industry. Plan on working your butt off.