Earlier quoted context omitted.
If you just want to dip your toes in the water, you could always start mining. Doesn't take any initial investment or bank information or anything like that, just processing power.
Aren't the odds of making a single bitcoin as a lone miner, with an ordinary computer, over any sane period of time pretty microscopic at this point? To make any money that way, you'd need to join a mining pool, and at that point you're not really just dipping your toes in the water anymore.
Joining a pool is pretty painless though. You just create an account, and probably give them an email address, and then start running GUIMiner or something. You also give them a Bitcoin address to send the rewards. That's it, no other personal information needed.