You can become a professional crypto trader so far you can read and understand. What makes a good crypto traders is his willingness to take reasonable, calculated risks to invest coupled with the willingness to learn.
The first step to becoming a professional crtpto trader is to get all the necessary information at hand, making research, reading materials and taking online crypto courses. After this you need to learn to start small. Look for exchanges that are not difficult to understand, have a simple user interface, offer low trading fee and also provide all the necessary information about cryptocurrency to people who are willing to learn, especially people who have little to no knowledge about crypto but are willing to trade it. An example of such an exchange is the Quidax exchange, and they also have a blog where you can read all that you need to become a good crypto trader.
In addition to that, also look at security measures and transparency in how they handle customers funds and asset, because there are several exchanges out there that are prone to exploits.