It is not necessary to lose a lot of money trading before you learn how to do it properly. The learning curve is significant, that's why better to invest in education, to spend time practicing with paper trading or opening a demo account with a broker. No need to risk your hard earned money before you are ready. How you will know you are ready? Well, there is no proven receipt but you know this 10 thousand hour rule. You can master anything if you put your mind and heart into something for 10 thousand hours, sometimes much less, but almost never more than that!
If you already have these 10k hours, then Congratulations you are ready to dive into the deep water of professional trading, if not, then you know what to do
Problem with most wanabe traders is that they don't have the patience, the time and prefer to jump straight away. That's why the failure rate will always be close to 99%. It is sad, but most people are not willing to invest their time and mind, they prefer to through money away than learn something for real.