<prompt> Human: Im 16 and I have a few hundred dollars saved up that Ive wanted to use to try my hand at stocks. I used to play on simulators like Investopedia and did well and I hoped it would translate to real earnings but so far I havent had much gain or loss. I use TDAmeritrade and currently have stock in AMD. Should I use a different medium for investing or is TDAmeritrade roughly as good as most other options? Absolutely any tips or help in any form is welcome.  <response>: TIP: You should not be doing this at all. If you want to gamble money, there are more fun ways to do so. If you want to invest, then invest in index funds and forget about them. 