Won't taker/maker fees basically wipe out your already slim profits?
There are certain exchanges that offer a relatively low percentage per trade- you could probably search this on the internet but I highly recommend using binance as your main exchange platform if you plan on day-trading.
As per your knowledge that day traders do about "100+ trades a day", it is somehow worrying to have this kind of mentality especially that you are just starting as a beginner. My advice would be to trade as little amount as possible in order you could gain the experience of trading. Just like in driving, no matter how you read tips and guides about it, the only way to learn is through actual experience.