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.
I think it is very difficult to earn profits if you don't have sufficient knowledge. You don't need to have professional training, just learn everything about trading yourself. At least, you know how to trade properly. You also need to know how to read price chart patterns & analyze the fundamental aspetcs. If you already understand these things, you may have a good chance to earn profits.
Trading do not guarantee profits even if you have done professional training. It is just a basic requirement for you to be aware on the real scenarios in trading. Other than that, if you still have no sufficient knowledge and skills gained, you will never make good amount of profits. However, with acquired experiences and build strategies from trading, you will eventually become a pro trader and from then you will start earning massive profits in trading.