Affiliate Marketing Secrets

I am 14 years old. Me and a friend are very interested in stocks. We want to spend some years researching the ins and outs of investing, and then start investing maybe when we are 15 in a few months or 16. I realize that our legal guardians are supposed to open a custodian account for us. Where would I go to open this? Also, could someone just explain some simple things to me very very briefly, like NASDAQ and DOW? Im reading a bunch of books, and I would just like to increase my vocab. Thanks!

Whenever the market opens or closes, NASDAQ had this really cool song that they play leading up to the bell being rung. Is this song available to listen to? Does it have a name? Or is it just NASDAQ secret sauce.