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In the first place, they have to analyze the theory of fundamental analysis and technical analysis very well. The technical analysis is where we can see all those lines and the so-called Japanese sails that at first can look a bit complicated because they see it as an airplane that has millions of buttons but do not get scared because they will not need to know all the indicators to have a correct strategy and plot. Over time you will realize that there are many indicators but maybe only use two or three in each graph. With regard to the fundamental analysis are the news that can happen both in macroeconomics and in microeconomics and how these news affect markets, stocks, currencies and cryptocurrency. In the following link I will leave you some of the most used indicators and that you can visualize the cryptocurrency market in real time: https://es.tradingview.com/
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The second thing you have to know is that trading has something great like simulators or accounts, that these are one of the few markets that you can do or make transitions with fictitious money or a lie before investing your real money. These simulators allow you to completely see statistics in real time as if you were really in an account where real funds are handled, so they could be making transactions testing strategies and letting go in the market.
Here are some demos to practice before investing real money: 
One of my recommendations is that every time they go trading there will be a demo account and invest the same thing that they will invest in the real account since for example in the demo account they can invest $ 500 and lose $ 150 and then they get used to What losing is very easy or winning is very easy.
3
With regard to profitability is that the internet exists infinity of information that promise many things with respect to markets and their statistics that seem magical and if everything were so easy everyone would do it and everyone would have a lot of money, do not leave deceive by exorbitant information because they are false. Speaking of actions like forex, Exchange (cripto exchanges), actions, ect. The profitability that can be achieved in a year can be up to 40% this is constant and working with discipline, if a person tells you that you can multiply or triple your money in a short time that is a lie, think that the same thing you can earn you can lose
4
Think of being an Integral Trader, I mean that if you know how to manage Forex and currencies it will be much easier to manage in the stock market, the Exchange and the options, all this is a learning path since investing in different markets allows you to obtain a much more global analysis and ensure more opportunities. Many times when we are tracing in Forex there is the opportunity to operate in a short time because sometimes it is necessary to get a good return but maybe it is not the right time and you could do it another day where you could do it more sincere and safe, that is if you rush.
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The trader is a learning process, think that if the trading has a line of learning where if you want to learn a language or study a new market you have to do it because although it is the theoretical part is the fundamental basis to build all your knowledge and put it in practice, example you can say how to drive and put crochet in each change but if you do not practice it can take months to learn it.
Until now we have seen that we need to handle the practice, theory and emotion management THREE components that are super necessary, so think that you have a learning curve that can take more or less of the time depending on how you educate yourself, that's why I recommend you to do some courses before investing if you know anything about it, it is better to invest in knowledge and then put it into practice than to invest without practicing risking losing.
Greetings and I hope you serve my post.