Your question reminds me of a quote I saw a while ago in this comment15 by @Josh6 “If someone found a way to make money, they will not spend their time telling the world how to make money. They will spend their time making money, unless you are their way of making money.” If anyone was really good at day trading, they'd be busy making money not creating a website to train people on how to do the same.
And I wouldn’t use Freetrade for day trading. The app doesn't have live prices and this could lead to very undesirable results. If you still decide to use FT you’ll most likely figure this out within the first couple of hours of using it.
It’s always better to invest for the long term. You should read this book: The Intelligent Investor by Benjamin Graham. It changed my life.
I hope this helps!