https://claytrader.com/blog/broker-review-robinhood-trading-app/

I would recommend it to start for few reasons: 1: It's free. 2: If you get Robinhood Instant, you'll have immediate access to your money (first $1000). 3: with Instant, you'll have access to your money from previously sold stock whereas with all other brokers, you have to wait 3 days for it to settle. 4: It's up to the second. You won't miss a thing. I hope that helped :)

I heard its bad bc the executions are slow

Robin hood sucks horrible executions