Prop firms cap your risk so you can't blow up your personal savings while learning. Their strict rules force disciplined trading, and if you profit under those constraints, you'll likely profit with your own money too.
Another advice that I have for people that are beginning is the fact that prop firm for them are a good tool. Because with prop firm, first of all, the maximum risk you can take is the prop firm account, the challenge that you pay. And this is keeping you from doing degenerate stuff. So putting your savings or putting a lot of money and losing all of them. Second of all is the fact that if you are good in prop firm with all these rules and you have a profitable model, there is a big probability that you will be also profitable in the personal account, even more. Because the rules in the future side of the prop firm are really aggressive, really aggressive.
