Real estate is the actual land and any structures on it.
A land developer will buy the real estate and build on, improve or develop the real estate.

For becoming a real estate agent, you would need to first go through some type of real estate training courses. Than you will need a to get an actual real estate license so that you are able to sell real estate.

The Peugeot 306 Estate is not an actual place. The Peugeot 306 Estate is a type of French car built by the manufacturer Peugeot. These cars are no longer being made, but still can be purchased used.

Obtaining a real estate appraisal license will involve building up experience to get the actual license itself. You may have to obtain a trainee license first, and then work in a real estate appraisal office.

You can find these everywhere. You could go to an actual real estate building and ask for classes. For sure they will tell you where you can go and they might even have their own classes.