If you are serious about learning set up a trading account with a small sum of money. If you are worried about losers then a paper trading scenario works too. Then just learn the basics and keep learning from doing. You can read all the books and watch all the videos but as with most things in life actually getting involved and hands on will be more valuable than anything.
Most people on here are into early stage startups and it's a very different game than investing in established companies.
Although I'm sure you might get some good response here, I also recommend other communities like Motley Fool.