It's start with practice but research is key. The more research you do, be it reading on to the whitepaper or even technical analysis, the larger you chance to make more is. I think in time people who spent time will be succesfull in this endeavour, although luck is important too.
It is also advisable that he go to some expert traders and learn from them as these people already have good experience in trade and know well that what to do in what time so if you will sit with them they will also guide you about the future happenings.
It is not harmful to ask other people for help and guidance. Trading cryptos can be researched and studied but believe me, once you are in there you will find yourself thinking if what you have researched is right. The experience in the real trading is different from what you are reading. Emotions can ruin any plans you made plus the volatility of the coins that is really unpredictable. Knowing some people who have been long in this community and in trading is much better that guessing in trading. Try to get some tips from them and understand how they have come so far though many forks and challenges have gone.