Mate I appreciate that you seem to be coming at this with honest curiosity, but do yourself a favour and get this information from reputable news sources.
This whole thing is so polarised and so full of misinformation that anything you read from randos on social media you have no way of knowing if it’s credible or complete bullshit.
The exception is password managers. It’s a very rare tool that makes things more secure and easier.
Your OS probably comes with one, and if not there are cheap or even free ones available.