Not that easy ah.

As know, if you are in a Company like long&foster , you need
pay 50%-20% of your commison to your Company. That means you can only get 1.5% to 2.4% from the seller. The more you sell. the higher commission you can get. And, you have to pay ads, gas, phone, and some office expense(this is low in this case).
If you are in a company like ReMax, you need to pay more that 20K a year and then get the full commision.

As realestate agent, you are considered self-employed, even you are signed with some company. So you need pay more tax.

And, they only get paid by commision, so no sell no pay. Kind of risky job too.