$500 is already a big capital for scalping and yes you have the potential to earn 2% or more per day with just $500. There are alot of trading guides for scalping around the internet those videos will teach you what indicators and patterns you should use to successfully plan a good trade. For a platform, I would recommend Binance specially Binance Futures feature if you want to scalp. Just do your research before entering if you have no experience on trading.