Re: real estate
You need to be licensed to sell real estate. So that means you have to take a test. You can order the books and then pay to take the test or enroll in a class to prepare you. It varies by state so look it up.
The people who do best in real estate are well connected which is to say the richer your friends the better.
It's a commission-only business so you ought to have 6-9 months savings to live on while you build your book. It's a tough hazing process but you can make a nice living for yourself if you make it through the hard times.
Research it on the net and seek out a few successful professionals in your area. The advice they dispense will be the most valuable.
Two wrongs don't make a right but three lefts do.