I payed for some of my knowlegde, some I got for free and some came with experience. You can start at Babypips.com to create a base for your trading. You can youtube some trading channels, but you need to be careful with scammers..too many in this business lol. After you have developed or copied a trading style, you can dive deeper into specific trading techniques by reading books, websites and watching videos about that specific style.
In my opinion, paying for training is not a problem as long as you do not have any correct information