Replying to Stock Trading Website?

So I just turned 18 yesterday, and was looking into possibly investing in some stocks. I know there are millions of different websites out there. I would probably do some day trades, I have about 2000 to start, possibly more. Was wondering which stock trading website would be the best for me. Or any possible benefits/cons of certain trading websites from experience.

Sparknotes: Which stock trading website is the best. (No I'm not looking for stock advice)

Thanks.