Easier said than done. Most people don't know anything about bitcoin, money, technology, or anything else they'd need to self custody without the help of a 3rd party. I'd much rather recommend paid services that help people use self-custody than leave them to figure it out on their own. But by all means if you want to train your friends and family and co-workers how to use the available free options please do. We need more people doing that too, but it's a big responsibility.