Yes it's true, there are many different styles when it comes to investing from fundamental to technical analysis. Rather than telling what you should buy now, I think it's more important for you to pick an investment style that you are comfortable with and are willing to stick with over a long term. Because investing is a marathon not a sprint. You need to make many decisions about which stocks to add or remove along the way. Having a strategy is like using a compass that will guide you through your investment journey.
At PyInvesting, we provide a backtesting platform for you to customize your own strategy to fit your needs. You can then run a simulation to find out how your strategy would have performed in the past based on historical data. This allows you to test whether your strategy works so that you can invest confidently. Once you are happy with results, you can choose to go live with your strategy, where our website will update your backtest daily and send you an email with your live orders and positions everyday.
Hope this helps! Do let me know if you have further questions.