Everyone has to begin from scratch but as a newbie, we may not be equipped with all the necessary knowledge required for trading it will obviously take time to experience even if we study hard from various sources.
Trading is quite profitable but day trading is highly inconsistent to make profits so one who traders on a daily basis can lose their profits at one bad trade that takes few days to good trades.
What special knowledge is necessary to start trading? A person who registers at exchange know what is more or less, knows numbers. It takes minutes to get familiar how to trade, where are sell/buy and order book is located. A person see increasing and decreasing numbers. Seems quite simple to start. Not to mention that it usually takes minutes to buy crypto from card for any amount and start trading. Imo it isnt hard to start, it is harder to predict price movement. But that is a different thing. I call it research. To learn to research market or cryptocurrency indeed is complicated. But is very simple to click two buttons, buy and sell.
IMO, the goal of someone starting trade is to make profits not just to trade itself so if someone who is gonna just take the call based on what they see on their screen without knowing how to strategize their trading plan is just gambling.
No need to acquire special skills, just the basics and it starts from picking their exchange. If they go and search on google then probably it will show some crap articles with shady exchanges.