I don't recommend courses on other sites, because I see Udemy is a good course right now. You can study well there, if you see it worth it or not, it depends on your ability to understand the trading knowledge given. Also, if you already have the basics of trading, you can also develop and retrain your skills on youtube or articles on how to trade. In trading, even though you already have knowledge, you must be able to maintain emotional stability and do not let greed make you regret your trading results.