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.
^ It is possible but the high risk would be also tied up.
You can do copy trading on a trading platform that has offer this kind of feature and choose professional traders to copy their portfolio but unfortunately, this is based on luck,
Whe I hear luck, I think of gambling. Copy trading won't really be about luck as, the so called or self proclaimed and acclaimed professional traders have possibly done there analysis and so, your not just really jumping in the market but doing so based on trust in someone else's trade and analysis.
Copy trading is never the best way to go about trading the crypto market, its more of an advantage should you give learning a chance. For this reason, demo mode has been put in place in many exchanges and utilising it to gain experience should be a way to better your chances in trading live. Be ready to build trust in a strategy you would come up with.