If I could talk to my 20 year old self I would recommend this: Stay away from the Internet as much as possible and don't look for general advice.
Most information is of little use no matter whether it's right, wrong, deep, entertaining, scientific, religious, whatever... Many may realize that but they continue to consume. The common trap is that most of us think there is no downside to consuming information and this, in my humble opinion is a huge mistake! It seems to me that the more stuff we shovel into our heads, the less able we are to get active. There is constantly such a long queue of inputs our brain wants to process that we have little energy left to actually develop intentions. When intention crystallize, motivation follows and so does action. I'd argue that people of average intelligence are not lacking success because they miss precious advice. It's because they don't actually have intentions! They can't allow themselves (mainly for financial oder societal reason, I assume) to relax and wait for curiosity to kick in. Instead they have it backwards: They hear about people who are having a career, they hear about others forming families, they hear the news telling them how the IOT is the future, they read up on cool stuff on wikipedia, read the biographies of celebreties, random stuff on reddit, they read career advice .... And then, from all that garbage, they try to deduce what to do. In most cases, that doesn't truly work because the result is not in line with their natural appetites and abilities.