noob,
The two best futures contracts to trade are the CL (Crude) and the TF (Russell 2K e-mini). I've been trading the TF for 7 years.
You gotta dump stocks and ETFs for day trading. Futures aren't capital intensive and the gains are taxed at 60% long-term / 40% short-term rates. In your tax bracket, that amounts to a savings of about 6K-7K per year on every 100K you make on futures gains over trading stocks/ETFs. Plus, it's a one-liner on your tax form (Section 1256 contracts) no matter how many trades you take in a year.
Risk your least in the beginning of a trade and incrementally add too winners if you want to go for more than a scalp. If you go for a scalp, go all-in / all-out and, as you gain more experience, consider incrementally scaling up your scalps as you have more "stop money" to play with [i.e. first, you fish for chum, then you use the chum to catch the big fish].
The overwhelming majority of newbies will trade heavy on their initial position and then take contracts off as the trade goes their way. This mathematically demands higher winning pcts. You can get very nice reward to risk ratios with lower winning pcts necessary if you DON'T trade this way.
Good luck.