Trading without capital is impossible, even in defi, you've got to have a collateral to be able to borrow. Having said this, obtaining trading skills and abilities is not a end in it's self, it actually a beginning of understanding the market structure and one self! I ability to repeatedly turn a profit require different type of mindset we are use to, Trading profitably is about think and believe in oneself!
If there’s no capital yet, find another way to earn free money which is really possible to achieve in cryptomarket. Start learning, don’t push yourself to trade even without any knowledge about it because trading is very risky. Having a positive mindset is always be an ideal thinking when it comes to trading, you must be more responsible trader. You can succeed in trading if you spend much time learning it, there’s no easy process for this one.