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.
A professional was once a starter. Don’t forget that OP.
To the answer of your question, then yes it’s possible.
But as you are starter, I would advise you to learn some trading knowledge at first before investing with real money.
There might be many tutorials on YouTube or here at the forum, from which you can easily learn how to trade.
At last remember one thing, trade only with that much amount of money, which you can afford to lose.
Wish you all the best for your future op.