Do you actually want to learn about trading strategies or you mean to learn how to actually buy bitcoin, forex stuff, etc., or both?
Trading strategy is a lifetime journey. You have to be in it for the long haul. You will get rekt and lose all your money. So play with very little, maybe $100 for first few weeks or month at which point you will have lost it all probably.
Best place to start is here: trading212.com/ go under LEARN an start watching vids. Start with oldest vid first. Watch every video multiple times. Take notes on paper. Then go through all their tutorials.
Then pick a single area where you want to lose your money. Such as just crypto, or just forex, and focus on those. The markets are vastly different, so pick one and stick with only that one. It's up to you.
Use tradingview.com to watch charts, and exchange of choice to execute trades.
Well, what is your background? If you are not related to the economics, learn first about how market works in general, some fundamentals. Then if you are interested in forex or stock markets, learn about fundamental analysis. Then learn about technical analysis. Then try to see patterns in historical data and try to analyze it. Then open demo account and try to make your own strategy and use it. And so on. This is constant learning and improving.
As previously mentioned by CryptoKujira, have a look at other traders' ideas on TradingView. Check lots of them, stay tuned with the market trend. Learn to recognize by yourself the patterns other traders identify and publish on the network.
Instead of playing with real money, I would recommend you to make use of demo accounts, at least until you own a winning strategy. Also stay away from robotrading and ATS, the only case you are going to make money with it is developing them on your own.
Idk why anyone would say "Don't use indicators." Indicators are great. You just need to understand how they're being calculated. I have created many of my own indicators. The argument against indicators is one of efficient markets, which is false. One of the best indicators I've used is MTPredictor. It works really well. There are many good, free indicators on TradingView but you do have to be careful and not get hopeful about trash maths. Some of the premium tradingview indicators are really good. Some of them have been duplicated for free on tradingview.