I know a very informative and extensive article that tried to cover every single aspect on this matter —
https://www.thebalance.com/day-trading-tips-for-beginners-on-getting-started-4047240. When I read it, I was amazed by how much information this article contains. And observing it was quite educative for me, as an advanced trader.
Also, I found a video on Youtube,
https://www.youtube.com/watch?v=wNYdfbRZL_w. So, if you prefer visual materials, that's good stuff for learning as well.
And here is a link for a day trading academy —
https://daytradingacademy.com/learning-how-to-day-trade-project/. Haven't tried it yet, but I believe it might help as well.