I do want to know if it's possible for a starter to gainfully earn from Crypto trading without having to go through a professional training.
This describes you as one who isn't ready to work but wishes to earn you know. Even a crop farmer after soring, still returns to weed. Its a simple law of nature that applies to investing or trading as you have it.
You never really make much profit out of a business you've got little or zero experience in. Before you go into a business, you ought to seek the advice of a professional of that field. Your inexperience simply means, your out there to make other traders rich as, its a highly risky and experience environment.
Though you might be lucky, luck will surely run out on you. Experience keeps you much longer or a little longer.
Professional training may not be so important just like it was before as everything should always start from a scratch and let your losses be your own motivation to learn and develop knowledge and skills through the available resources online and offline. With the help of free internet nowadays, professional training may not so relevant that even not so good traders could end up as successful traders in the future.
This still stresses the importance of learning. Offline and online, the materials you meet are most likely from professionals and that could be seen for a training of some sort. Also, your success and failures in the market. Its important that you learn at least.