It's an amazing tool. And I would love to see for much more younger people give it a chance.

If you want to give it a chance, the only things I would advice you to keep in mind are:

1. be ok with spending enough time using it... in slow motion. New habits take time and practice before they become natural, even more as far as writing goes.
2. Keep it as simple as you can. You don't need to make it bulletproof/perfect before you start using it, quite the opposite. It's an organic system that will grow and change at your pace, don't force it into any preconceived direction because someone told you you should do it like that, or because it's trendy. Don't worry about categories or tags, or even about devising the ultimate numbering and indexing system. It's wasted time. The system is devised for evolving naturally (one of the reasons I don't fancy many of the digital apps: too rigid in their way) without ever needing to rebuild everything from scratch. To give you an idea, in my own system co-exist multiple numbering systems that I used and abandoned along the years, without any issue. My index(es) also changed a few times. But I never had to rewrite a single index card. Ever. Really, it's amazingly efficient provided you don't try to make it be the 'ultimate' and perfect system.