Use YouTube for partial learning because the basics of trading has been around that site for long now and also there are many updates from the sharer but of course don't use it in real trading unless you already understand the said strategy .
Also you can use those free trading practicing in Binance Platform or in other exchange that offers freebies as trials before we finally Hit the trading platform using real money because you can lose more if you don't make a deepest understanding.
You will never understand the real taste of anything until you do it personally. I won't suggest YouTube to anyone. Trading process we can learn from demo trading account as Instaforex offers 5K USD. Buying and selling this isn't such complicated work, but Coin selection is complicated. I would suggest this person stay focused on good projects.
You're right that we need practical knowledge, but before practicing, you need to know the knowledge first right? Can you tell me how you understand the way the market works? How do you analyze the up and down trends through charts? How can you read the situation in which you jump in and jump out? New traders should take a look at Youtube videos to understand the fundamental knowledge before joining the market to practice. Don't be hustle or you will lose your capital for nothing!